Joan’s Nursery specializes in custom-designed landscaping for residential areas. The estimated labour cost associated with a particular landscaping proposal is based on the number of planting of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labour time for the planting of a medium-sized tree. Actual times from a sample of 10 planting during the past month follow (times in hours).
1.7 1.5 2.6 2.2 2.4 2.3 2.6 3.0 1.4 2.3
Test to see whether the mean tree-planting time differs from two hours.
State the null and alternative hypothesis

Answers

Answer 1

Answer:

H0 : μ = 2

H1 : μ > 2

We fail to reject the null and conclude that no significant evidence exists to support that mean tree-planting time differs from two hours.

Step-by-step explanation:

Given :

X = 23.71,17.79,29.87,18.78,28.76

Sample mean, xbar = Σx / n = 22/10 = 2.2

Standard deviation, s = 0.516 (calculator)

H0 : μ = 2

H1 : μ > 2

Test statistic :

(xbar - μ) ÷ (s/sqrt(n))

n = 10

Test statistic :

(2.2 - 2) ÷ (0.516/sqrt(10))

0.2 / 0.1631735

Test statistic = 1.23

Using the Pvalue from Tscore calculator, df = n - 1 = 10 - 1 = 9

Pvalue(1.23, 9) = 0.1249

Since, Pvalue > α ; We fail to reject the null and conclude that no significant evidence exists to support that mean tree-planting time differs from two hours.


Related Questions

the model shows -3x + 5 + 2x - 1. what value of x makes the equation true?
a. x = -6
b. x= 4
c. x = -4
d. x= 6
please help. 30 points

Answers

Answer:

hopes this helps

Step-by-step explanation:

B -x+4

Using the letters suggested, construct a simple formula:
A car travels a km/h for b km and makes another journey at c km/h for d km.
a. Find the total distance (s km) the car travels
b. Find the formula for the Average Speed of the entire journey.

Answers

Answer:

Speed = distance / time

Time = distance/ Speed

Distance = Speed x time

Help please this is for an important test

A cup on the teacher's desk contains 12 pens. There are 3 pens with blue ink and 9 pens with black ink. One student at a time selects a pen at random to sign the attendance sheet and then puts the pen back in the cup.

What is the probability that the first three students all randomly select a pen with blue ink?

A. 1/4
B. 1/27
C. 1/64
D. 1/220

Answers

We have 12 pens in total

P(first three pens are blue with replacement) = 3/12 * 3/12 * 3/12 =

(1/4) * (1/4) * (1/4) =

1/ 64

The required probability  that the first three students all randomly select a pen with blue ink is 1/64. option C is correct.

Given that,
A cup on the teacher's desk contains 12 pens. There are 3 pens with blue ink and 9 pens with black ink. One student at a time selects a pen at random to sign the attendance sheet and then puts the pen back in the cup.

What is probability?

Probability can be defined as the ratio of favorable outcomes to the total number of events.

Here,
Total number of sample = 12
Favorable outcome = 3
Required probability  that the first three students all randomly select a pen with blue ink = 3 / 12 × 3 / 12 × 3 / 12
                             = 1 / 64

Thus, the required probability  that the first three students all randomly select a pen with blue ink is 1/64. option C is correct.

Learn more about probability here:

brainly.com/question/14290572

#SPJ5


I need help ASAP!!!!!! Calculate the slope of the line through the points (-1, 1) and (4, 0).
A. 5x
B.-1/5
C.1/5
D.-5

Answers

Answer:

B. -1/5

Step-by-step explanation:

To find the slope we place (0-1) over (4- (-1))

Please help me I've been on this question for like and hour-

Answers

Answer:im so sorry i dont know this one

Step-by-step explanation:but i would try adding subtracting or divison

Answer:

21

Step-by-step explanation:

We can use a proportion to solve this problem

8 : 33.6 = 5 : OP

OP = (33.6 x 5)/8 = 21

¿Cuál de las siguientes respuestas es equivalente a 5 km?
(3 puntos)
50.000 metros
500 metros
5.000 metros
0.005 metros​

Answers

Answer:

5

[tex] 5 \times 100 = 500[/tex]

Find the volume of a sphere with a diameter of 6.2 in.

Answers

Answer: its 23 meters

Step-by-step explanation:

The volume of a sphere with a diameter of 6.2 in is 39.72π

What is the volume of the sphere?

The volume of a sphere is defined as the total amount of capacity applied in a sphere that can be calculated using the volume formula for the sphere which is V = (4/3)πr3.

The radius of the sphere is;

[tex]\rm Radius =\dfrac{Diameter}{2}\\\\Radius=\dfrac{6.2}{2}\\\\Radius=3.1[/tex]

The volume of the sphere is;

[tex]\rm Volume =\dfrac{4}{3}\pi r^3\\\\Volume =\dfrac{4}{3}\pi (3.1)^3\\\\Volume = 39.72\pi[/tex]

Hence, the volume of a sphere with a diameter of 6.2 in is 39.72π.

Learn more about sphere here;

https://brainly.com/question/9994313

#SPJ2

Which table represents a function

Answers

Answer:

A

Step-by-step explanation:

because it passes the vertical line test and also for every x, there is only one y

49°
Solve for 42.
2 = [?]
44/62

Answers

Answer:

∠2 = 41°

Step-by-step explanation:

∠2 + 49° + 90° = 180°

∠2 + 139° = 180°

∠2 = 180° - 139°

∠2 = 41°

Answer:

[tex] \displaystyle \angle2 = \bigg[{41}^{ \circ} \bigg][/tex]

Step-by-step explanation:

we are given a right angle triangle

we want to figure out the missing interior angle

recall that,

one of angle measure of a right angle triangle is 90° interior angles of a triangle add up to 180°

thus our equation is

[tex] \displaystyle {49}^{ \circ} + \angle2 + {90}^{ \circ} = {180}^{ \circ} [/tex]

simplify addition:

[tex] \displaystyle \angle2 + {139}^{ \circ} = {180}^{ \circ} [/tex]

cancel 139° from both sides:

[tex] \displaystyle \angle2 = {41}^{ \circ} [/tex]

hence,

the measure of the missing angle is 41°

Given F(x) = 3x-2 and G(x) = 4-x2. Evaluate 2F(1) - 3G(3).

Answers

Answer:

[tex]9x^{2} -34[/tex]

Step-by-step explanation:

Use the given functions to set up and simplify [tex]2F(1)-3G.3.[/tex]

The point in the middle between 3G and 3 is a multiplication sign btw

For the given configuration, determine how many different licence plates are possible of (a) digits and letters can be repeated, and (b) digits and letters cannot be repeated. NO LINKS!!

Answers

9514 1404 393

Answer:

  5a,b = 17,576,000; 11,232,000

  6. 45,697,600; 32,292,000

  7. 6,760,000; 3,276,000

  8. 118,813,760; 78,936,000

Step-by-step explanation:

The number of possible ways the characters can occur is the product of the numbers of ways a character can be selected in each position. If letters or digits cannot repeat, the number of possible selections is reduced by 1 in each new location.

5a. 26×26×26×10×10×10 = 26³×10³ = 17,576,000

5b. 26×25×24×10×9×8 = 11,232,000

__

6a. 10²×26⁴ = 45,697,600

6b. 10×9×26×25×24×23 = 32,292,000

__

7a. 10⁴×26² = 6,760,000

7b. 10×9×8×7×26×25 = 3,276,000

__

8a. 26⁵×10 = 118,813,760

8b. 26×25×24×23×22×10 = 78,936,000

Can somebody help, will give brainliest

Answers

9514 1404 393

Answer:

c = 2segments 10, 8, 6 (top down)

Step-by-step explanation:

The sum of top and bottom bases is twice the midsegment.

  (c² +6) +(c² +2) = 2(4c)

  2c² -8c +8 = 0 . . . . . . . . . subtract 8c

  2(c -2)² = 0 . . . . . . . . factor

  c = 2 . . . . . . the value that makes the binomial be zero

The value of c is 2; the segment lengths (top-down) are 10, 8, 6.




Mathematics
10³x10³x10²​

Answers

Answer:

100,000,000/10^8

Step-by-step explanation:

10^3 = 1000

10^3 = 1000

10^2 = 100

Therefore,

= (1000) x (1000) x (100)

= (100,000) x (100)

= 100,000,000

or

= 10^8

A large popcorn bag holds four times as much as a small popcorn bag. At the end of a party,

3 1/3 small bags and 2 1/4 large bags were left.


a) How many small bags would the leftover popcorn fill?


b) How many large bags would the leftover popcorn fill?


Please help me fast, also show all work and steps please:)

Answers

Answer:

A]  37 / 3 = 12 1/3 ; B] 37 / 12 = 3 1/12

Step-by-step explanation:

Let small popcorn bag hold = p units popcorn. So, large popcorn bag hold 4 times ie 4p units popcorn.

Left popcorn = 3 1/3 ie 10 / 3 small bags , & 2 1/4 ie 9 / 4 large bags.  

So, total popcorn left = Sum( No. of popcorn in each bag x no of bags) =        [ 10 p / 3 ] +  [ (9 x 4) p / 4 ] = 10p / 3 + 9p  = (10p + 27p) / 3 = 37p / 3

A] Small bags for left popcorn = Total left popcorn / Per small bag popcorn  = ( 37p / 3 ) / (p)  = 37 / 3 = 12 1/3

B] Large bags for left popcorn = Total left popcorn / Per large bag popcorn   =  ( 37p / 3 ) / (4p) = 37 / 12 = 3 1/12  

How many solutions
Line A: x + y = 2
Line B: 2x + y = 4

Answers

Answer:

1 solution (2, 0 )

Step-by-step explanation:

Given the 2 equations

x + y = 2 → (1)

2x + y = 4 → (2)

Subtract (1) from (2) term by term to eliminate y

2x - x + y - y = 4 - 2 , that is

x + 0 = 2

x = 2

Substitute x = 2 into either of the 2 equations and evaluate for y

Substituting into (1)

2 + y = 2 ( subtract 2 from both sides )

y = 0

one solution is (2, 0 )

unction f(x) = (x − 4)(x − 2) is shown. On a coordinate plane, a parabola opens up. It goes through (2, 0), has a vertex at (3, negative 1), and goes through (4, 0). What is the range of the function? all real numbers less than or equal to 3 all real numbers less than or equal to −1 all real numbers greater than or equal to 3 all

Answers

9514 1404 393

Answer:

  (d)  all real numbers greater than or equal to -1

Step-by-step explanation:

The y-value of the vertex at (3, -1) is the minimum of the function. All y-values equal to or greater than -1 are in the range of the function.

  y ≥ -1

HELP CAN SOMEONE TELL ME THE ANSWER I CANT GET A BAD GRADE.

Answers

Answer:

34.1cm^2

Step-by-step explanation:

Area of triangle = 1/2 x base x height

=1/2 x6.2 x11

=34.1cm^2

Item 2

Jake ran 145 meters before lunch and 389 meters after lunch.


How many kilometers did Jake run in all?


A. 0.00534 km


B. 0.0534 km


C. 0.534 km


D. 5.34 km

Answers

145 meters + 389 meters = 534 meters. There are 1000 meters in 1 kilometer so the total kilometers ran is 534/1000 = 0.534 kilometers.

Is it possible for a triangle to have a 54 degree angle and a 126 degree angle? Explain why or why not.

Answers

Answer:

No

Step-by-step explanation:

Those are only 2 angles and they already equal 180, Every single triangle has a sum of 180 and if you already hit 180 with only 2 out of the 3 points, it's not possible

Answer:

No

Step-by-step explanation:

No, because the 3 angles of a triangle have to add up to 180 degrees. The given 2 angles already add up to 180 degrees leaving no room for the missing angle.    

Simplify 5 (x + 2) + 2 (x - 5)

Answers

Answer: 7x  let me know if you need an explantion.

Can someone please help me it’s urgent

Answers

Answer:

8.5 in

Step-by-step explanation:

You are solving for the hypotenuse right? So you would use this formula:

c = square root a^2+b^2

the c is the hypotenuse (long side of a right triangle) and a will be 4 and b will be 7.5. substitute the numbers in, solve, and you get 8.5 inches!

x = square root 4^2 + 7.5^2

x = square root 16 + 56.25

x = square root 72.25

x = 8.5 inches

Question 1
Simplify the following arithmetic expression without using a calculator:
1/2 + 7/8 X 49/8 = 7/2 - 3/32
12-1/2 x 271/2​

Answers

Answer:

0 = 0 = 0 = 0 = 0 < 1/

2

< 7/

8

< 7/

2

< 49/

8

< 12 < 271/

2

0 is equal to 0 is equal to 0 is equal to 0 is equal to 0 is less than 1/

2

is less than 7/

8

is less than 7/

2

is less than 49/

8

is less than 12 is less than 271/

2

0/

8

= 0/

8

= 0/

8

= 0/

8

= 0/

8

< 4/

8

< 7/

8

< 28/

8

< 49/

8

< 96/

8

< 1084/

8

Step-by-step explanation:

(-8,3)(-3,-4.5) what is zero of g?​

Answers

Answer:

the daimeter of the heart of the heart of the heart

if A(2;2) and B(-3;4), determine the equation of AB, in the form y=mx+c​

Answers

Answer:

[tex]y = -\frac{2}{5}x + \frac{14}{5}[/tex]

Step-by-step explanation:

Equation of a line:

The equation of a line has the following format:

[tex]y = mx + c[/tex]

In which m is the slope and c is the y-intercept(value of y when x = 0).

A(2;2) and B(-3;4)

When we have two points, the slope is the change in y divided by the change in x. So

Change in y: 4 - 2 = 2

Change in x: -3 - 2 = -5

Slope: [tex]m = \frac{2}{-5} = -\frac{2}{5}[/tex]

So

[tex]y = -\frac{2}{5}x + c[/tex]

A(2;2)

When [tex]x = 2, y = 2[/tex]. We use this to find c.

[tex]y = -\frac{2}{5}x + c[/tex]

[tex]2 = -\frac{2}{5}(2) + c[/tex]

[tex]c = 2 + \frac{4}{5} = \frac{10}{5} + \frac{4}{5} = \frac{14}{5}[/tex]

So

[tex]y = -\frac{2}{5}x + \frac{14}{5}[/tex]

13 - [(3² x 4) - 30]

Answers

Answer:

7

Step-by-step explanation:

13 - [(3² x 4) - 30]

13 - [(9 x 4) - 30]

13 - (36 - 30)

13-6

7

Answer:

7

Step-by-step explanation:

I think the answer you're looking for is 7

Order these numbers from least to greatest: 5, 0, 1, -13 -1-1

Answers

Answer:

-1 1/2, -1, 0, 1/2, 1

Step-by-step explanation:

Help, I need this as quick as possible

Answers

Answer:

multiply the top number by 4 also and what ever answer you get by doing 24×4 place that number over 100 and that number will be your percentage

(100 POINTS WILL MARK BRAINLIEST FOR ACTUAL ANWSERS) Write an equation in standard form of the ellipse with vertices (0,-2) and (8,-2), and a focus located at (7,-2)

Answers

Answer:

(x-4)^2 / 16 + (y+2)^2 / 7 = 1 or 7x^2-56x+16y^2+64y+64=0

Step-by-step explanation:

Either one should be right I think. Hope this helps.

help plssssssssssssssssss

Answers

Answer:

There’s two options for each. Look below.

Step-by-step explanation:

Savings: there is no risk of losing any money put into this account

              interest income is the only way to earn money in this type

‘investment: this account may generate income from a variety of sourses.

                  If no deposits or withdrawals are made, money held in this acct..

Write a equation to represent the hanger ,7th grade math help me

Answers

2x=11
I this this because the look at the equation it says it all or if im wrong ask your teacher
Other Questions
Write 0.00000000000000000000000000167 as a multiple of a power of 10. Buffalo BBQ Restaurant is trying to become more efficient in training its chefs. It is experimenting with two training programs aimed at this objective. Both programs have basic and advanced training modules. The restaurant has provided the following data regarding the two programs after two weeks of implementation: Training Program A Training Program B New chef # 1 2 3 4 5 6 7 8 9 10 Hours of basic training 22 24 28 21 23 25 24 29 31 28 Hours of advanced training 8 7 8 10 11 4 3 0 1 2 Number of chef mistakes 12 13 15 14 14 7 6 8 5 6 a. Compute the following performance metrics for each program: (1) Average hours of employee training per chef, rounded to one decimal place.(2) Average number of mistakes per chef, rounded to one decimal place. b. Which program should the restaurant implement moving forward? 11.{THE LAST ONE, LETS GO! THIS IS A POG MOMENT} helpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp I need help with this question (a) An object has a density of 17g.3cmand a mass of 272 g. What is thevolume of the object?Volumea What is a TRUE statement about peer groups?ginningA:Peer groups lack any system of rewards and punishments for norms.B:Peer groups have no influence on socialization into adulthood.C:Peer groups are the first and most important agent of socialization.D:Peer groups become more important as a child ages. VA ROGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG What verb would you use for " t y Jose"? What is the chemical name for 1 nitrogen atom,2 hydrogen atom? How does the environment influencegenetic traits? On a number line 6.64 would be located Consider the three isotopes of carbon. What do the three isotopes have in common? Choose all that apply.A)They have the same atomic number.B)They have the same number of protons.c)They all have four valence electrons.D)They have the same number of neutrons.E)They have the same average atomic mass number, NO LINKS OR ELSE YOU'LL BE REPORTED!Only answer if you're very good at math.Graph the equation below using the slope and y-intercept form. The cost of an online movie rental service is $89.94 for 6 months. What is the cost per month? (Level 2) 14. The measure of Fis 110. The measure of 2E is 100What is the measure of D?150 In this rectangle, find m angle DEC.Please help me!!!! Felix built a ramp based on the scale drawing below. If the height of Felix's ramp is 6 inchesfrom the ground, how long is the part of the ramp that is on the ground?1 in.12 in.60 in.24 in.72 in.17 in. In which quadrant would you find the point 4 and 8 Please help!! I have to turn this in like right now lol