Please, help me. Thanks.
Subject: Hypothesis testing and margin of errors

Please, Help Me. Thanks. Subject: Hypothesis Testing And Margin Of Errors

Answers

Answer 1

Answer:

See below

Step-by-step explanation:

Problem 4

[tex]H_0:\mu=145\\H_a:\mu>145[/tex]

The null hypothesis, [tex]H_0[/tex], comes from the fact that the nurse initially thinks that the average height of 7th graders is equal to 145 cm.

The alternative hypothesis, [tex]H_a[/tex], comes from the fact that the average height may be greater than 145 cm since the nurse measured the average height to be 147 cm from the random sample.

Problem 5

[tex]H_0:\mu\geq273\\H_a:\mu<273[/tex]

The null hypothesis, [tex]H_0[/tex], comes from the fact that the manufacturer initially thinks that the mean lifetime of a certain type of batteries is at least 273 hours.

The alternate hypothesis, [tex]H_a[/tex], comes from the fact that the sample taken may show that it's actually less given a sample mean of 270.5 hours.

Problem 6

The mass population data set would be most suitable because the average score of a test comes from all those who have taken the test while the sample is the class with 25 students. That sample represents the population of all those that have taken the test.

Problem 7

Because it would take a lot of time and money to check every single child in Africa, it would make the most sense to use the sample data set where your samples come from each village and those samples have the children from each village.

Problem 8

This is a population characteristic because the sample that Sarah took for the average number of children per family represents the entire population.

Problem 9

This is a sample characteristic because the size of the sample was clearly large, this was a study, and other claims made.


Related Questions

Only number 5 please help

Answers

B. 60 this can be answered by also knowing degree angle's as it starts at 0 increments of 10

Write an equation in Point-Slope Form for the given information.

m=4/5;(2,0)

Answers

Answer:

y-0 = 4/5(x-2)

Explanation:

0 is the y point so it goes in the y-y1 spot. The m or the slope goes into the m spot by the parenthesis. The 2 goes into the spot of the m-m1. One thing that is important is that when plugging in the point into the equation is to always put in the inverse. So if 3 was the y point, the equation would be y-3, if it was a negative point it would be, y + 3.

An angle measures 52° less than the measure of its complementary angle. What is the measure of each angle?

Answers

Answer:

Measure of each angle is 71 and 19 degrees.

Step-by-step explanation:

Let's the angle  be "n"

Complementary angle = 90 °

n- (90-x) = 52

n - 90+ n = 52

Combine like terms

n - 90+ n = 52

2n-90=52

Add 90 to both sides of the equation

2n-90+90=52+90

simplify

2n = 142

Divide both sides of the equation by the same term

2n/2 = 142/2

Simplify

n = 71

2n = 142

Measure of each angle

1st = 71

2nd = 90-71 = 19

[RevyBreeze]

The tenth term of a linear sequence is 18.The term-to-term rule is subtract 4.work out the fourth term of the sequence? please explain why the answer is.....?​

Answers

The rule is to subtract 4. We know that the tenth term is 18. Let’s go back 10 terms, so we can find the 0th term. 4*40 is 40, and 18 + 40 = 58. Next, we need to find the 4th term of this sequence. We can do that by multiplying 4 by 4, which is 16. Next, we subtract 58 from 16. This gives us 42.

The fourth term is 42.

An equation to represent this situation is 58 - 4n. We can plug in 10 to check our answer. 58 - 4(10) is 58 - 40 which is 18.

Evaluate each expression when a=3 and b=8. Order the results from least to greatest.

Answers

Answer:

[tex]\frac{24}{a}[/tex] - b

[tex]\frac{b-2}{a}[/tex]

[tex]\frac{21}{a}[/tex]-[tex]\frac{b}{4}[/tex]

b - [tex]\frac{2}{3}[/tex]a

25 - 2b

5b - 10a

Step-by-step explanation:

a = 3 and b = 8

Plug in a and b into your equations.

25 - 2(8) = 25 - 16..........9

[tex]\frac{8-2}{3}[/tex] = [tex]\frac{6}{3}[/tex]..........2

5(8) - 10(3) = 40 - 30..........10

[tex]\frac{24}{3}[/tex] - 8 = 8 - 8..........0

[tex]\frac{21}{3}[/tex] - [tex]\frac{8}{4}[/tex] = 7 - 2..........5

8 - [tex]\frac{2}{3}[/tex](3) = 8 - 2..........6

Then you order least to greatest.

If anyone minds, can someone answer this and show your work pls.

Answers

Answer:

x=2 y=16 so (2,16)

Step-by-step explanation:

y=10x-4 --> 8x=10x-4

                  -10x -10x

-2x=-4

-2/-2x -4/-2

x=2

y=10x-4 --> y=10(2)-4

y=20-4

y=16

Answer:

2 ; 16

Step-by-step explanation:


y = 8x _
y = 10x - 4

___________
0=2x-4

4=2x

x=2

=> y=8*2=16

Answer this qn sm1



Also, can others check on my latest 2 qns?

Answers

Answer:

Check the attachment.

Represent 1.5, 2.7 and 0.9 on a number line

Answers

Answer:

Where would the decimal number 1.5 be on a number line? The decimal number 1.5 has a whole number of 1, which is the number to the left of the decimal. The number 1.5 is halfway between 1 and 2.

Step-by-step explanation:

Direction: give the property used in each equation. Then, write the missing numbers.
1.( 8+15 ) + ( 4+9 ) = ( 4+__) + (__+ 15 ) Property:________
2. (5

Answers

Answer:

( 8+15 ) + ( 4+9 ) = ( 4+9 ) + ( 8+15 )

Associative Property of Addition

Step-by-step explanation:

Select all the equations on which the point (10,0) lies.

Answers

Answer:

  B, C

Step-by-step explanation:

Since y=0, you are looking for equations such that 10 times the coefficient of x is the constant in the equation.

  a) 5·10 ≠ 15

  b) 2·10 = 20 . . . . select this one

  c) 10 = 10 . . . . select this one

  d) 3·10 ≠ 13

  e) 4·10 ≠ 20

  f) 6·10 ≠ 50

Sally has 8 coins in her wallet that added up to $1.10. She only has dimes and quarters. How many dimes did she have?​

Answers

Answer: 2 Quarters and 6 dimes

Step-by-step explanation:

2 quarters = 50 Cents
6 Dimes = 60 Cents
2 Quarters + 6 Dimes = $1.10

HELP ! ! HOW can I Solve these both Math Questions I am so confused Help!

Answers

Answer number 1.:

x=

31

−6≈−0.432235637

x=−

31

−6≈−11.567764363

answer number 2.:

Factor:

3 (x-(6 - 2   10

Evaluate:  

3 ( x2 - 12x -- 4)

Simplify 10 times the square root of quantity 2 y end quantity plus 5 times the square root of quantity 2 y end quantity plus 3 times the square root of quantity 2 y end quantity . 18 times the square root of quantity 6 y end quantity 18 times the square root of quantity 2 y end quantity 12 times the square root of quantity 2 y end quantity 18 times the square root of quantity 6 y cubed

Answers

Answer:

18√(2y)

Step-by-step explanation:

10√(2y) +  5√(2y) + 3√(2y) =

= 18√(2y)

= 18√(2y)

Simplifying Square Roots. To simplify a square root make the number inside to square root as small as possible (but still the whole number) Get your calculator or check if you need them are both have the same value this is the rule when a or b are possitive.

= 10√(2y) +  5√(2y) + 3√(2y)

= 18√(2y)

How do I use the simplify calculator?

Enter a expression who want to simplify into the editor. The simplification calculator allows you for take a simple and complex expression or simplify or reduce the expression to it is simplest way. The calculator works for both numbers or expressions containing variables

Learn more about Simplifying Square Roots here https://brainly.com/question/12903659

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the link don't work just tell me the answer

Answers

Answer:

6/8 = 12/18

Step-by-step explanation:

hope this helps :D

6*7=5*7 PLEASE HELP ME I NEED HELP

Answers

Answer:

Step-by-step explanation:

we simply the both sides:

6*7=5*7 |:7

So: 6=5 is remained. So I guess you’ll have to write it in this way:

6≠5.

3 John can clean pools at a constant rate of What is the ratio of pools to hours? pools per hour.​

Answers

The answer to the thing is 3 pools per each hour

What expression is equivalent to (4x–5) (2x-3)?

Answers

Answer:

8x^2-22x+15

Step-by-step explanation:

Multiply them together

Answer:

There are many, many, different expressions equivalent, but if you distribute them together you come up with:

8x² - 22x + 15

Step-by-step explanation:

When distributing (4x–5) (2x-3) we should end up with four values, and then add them together.

[] The outside numbers of 4x and -3

-> 4x * -3 = -12x

[] The inside numbers of -5 and 2x

-> -5 * 2x = -10x

[] The left numbers of 4x and 2x

-> 4x * 2x = 8x²

[] The right numbers of -5 and -3

-> -5 * -3 = 15

Now we can add them together;

-12x + -10x + 8x² + 15

8x² - 22x + 15

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

Write an inequality that describes all the points that are more than 3 units from 5.

Answers

Step-by-step explanation:

[tex]3 < x \geqslant 5[/tex]

Can someone please help me?

Answers

The answer to this question is C.

Find the product. Write your answer as a mixed number in simplest form 4 2/9 x 2 4/9

Answers

That would be 836/81, since the mixed number for is 10 26/81.

Hope this helps!

How long would it take to travel 315 mi at the rate of 45 mi/h?
360 h
or
14,175 h
or
270 h
or
7 h

Answers

Answer:

7 h

Step-by-step explanation:

315 miles / 45 miles per hour

cross out the miles since those units cancel out

7 hours

please help 5 POINTS THIS TIME SORRY MIGHT BE DOING A GIVE AWAY GIVING BRAINLIEST​

Answers

Volume of 1st box:

[tex]3 \times 5 \times 8 = 120ft ^{3} [/tex]

Volume of 2nd box:

[tex]3 \times 5 \times 4 = 60ft ^{3} [/tex]

Combined volume:

[tex]120 + 60 = 180ft ^{3} [/tex]

Can You answer this word problem?

Answers

Answer:78

Step-by-step explanation:

“When in doubt, write it out.”

We could display this algebraically. Let's call the initial number of people on the boat .

So,

−26+22=74

Then let’s combine like terms, -26+22 = -4.

⟹−4=74

Add 4 to each side…

⟹=78

Help me solve this problem

Answers

Answer:

=, there are equal

Step-by-step explanation: < means less than and > means greater than and = is just equal.

Use your calculator to the square root of 125.

The answer is 11.180...... and so on. But we just leave it as 11. Therefore, 11 and 11 are equal. That's the answer to your question.

Pleaseeeeee help??????????

Answers

Answer:

20 units

Step-by-step explanation:

there is a theroem when a tangent and secant intersect outside a circle

as per it

CU*DU = GU^2

7.2*DU = 12*12=144

DU = 20 units

TL
A triangle has sides with lengths of 8 feet, 15 feet, and 17 feet. Is it a right triangle?

Answers

Answer:

Step-by-step explanation:

To test if this is a right triangle, let's test these side lengths with the Pythagorean Theorem.

a^2 + b^2 = c^2

c is the hypotenuse, the longest side of a right triangle.

a and b are the legs of the right triangle.

a = 7

b = 15

c = 17

7^2 + 15^2 = 17^2 ?

49 + 225 = 289 ?

274 ≠ 289

Thus, this triangle is not a right triangle since it does not satisfy the Pythagorean Theorem.

have a good day :)

Jim has $84,410 in a savings account that earns 15% interest per year. How much will he have in 4 years?

Answers

Answer:

50,646

Step-by-step explanation:

Jim would have saved 50,646 in 4 years

1 Year= 12.6615

12.6615 x 4=50,646

Jim will have $5,149,010 in 4 years.

What is Simple Interest?

Simple interest is a method for figuring out how much interest was paid on a sum of money during a specific time period at a specific rate. Simple interest has a constant principle amount. Simple interest is a clear-cut and simple method for computing financial interest.

We have,

P = $84,410.

R= 15%

T = 4 years

Using Simple Interest

SI = (P x R x T) / 100

SI = (84410 x 15 x 4)/100

SI = 5,064,000

So, the amount is

= 84,410 + 5,064,000

= 5,149,010

Learn more about Simple Interest here:

https://brainly.com/question/25845758

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55 points please answer correctly you will be marked brainiest!

Answers

Answer:

Answers are in picture, and they are color-coded.

Step-by-step explanation:

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Answer:

Upper quartile- The median of the upper half of a set of data

Lower Quartile- The median of the upper half of a set of data

Quartile- Divides a data set into four equal parts

Range- Difference between the highest and lowest data points


Interquartile- The difference between the upper quartile and the lower quartile

Reflect across the Y-axis.H(1,3)H

Answers

Answer:

Is there a graph? I would love to help out just need a little more help.

Step-by-step explanation:

At a certain restaurant, 5 sandwiches and 7 burritos will cost $57.40. In addition, 4 sandwiches and
2 burritos cost $32.60. Assuming that we are talking about the same sandwiches and burritos, what
is the cost of 1 sandwich? What is the cost of 1 burrito? Let x represent the cost of a sandwich
and y represent the cost of a burrito. Show ALL work!
Equation #1:
Equation #2:
Cost of 1 sandwich:
Cost of 1 burrito:

Answers

Answer:

sandwich: $6.30burrito: $3.70

Step-by-step explanation:

The two relations can be written in general form using the given variable definitions as ...

  5x +7y -57.40 = 0

  4x +2y -32.60 = 0

The solution using the cross-multiplication method is ...

  d1 = (5)(2) -(4)(7) = 10 -28 = -18

  d2 = (7)(-32.60) -(2)(-57.40) = -228.20 +114.80 = -113.40

  d3 = (-57.40)(4) -(-32.60)(5) = -229.60 +163 = -66.60

  x = d2/d1 = -113.40/-18 = 6.30

  y = d3/d1 = -66.60/-18 = 3.70

The cost of 1 sandwich is $6.30.

The cost of 1 burrito is $3.70.
_____

For more about the cross-multiplication method of solving systems of equations, see ...

  https://brainly.com/question/26397343

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