From the provided sample, The mean variance and standard deviation of the sample is given by [tex]\bar x = \frac{\sum x}{n} , variance = {standard deviation }^2[/tex] and
[tex]\sqrt \frac{\sum {(x-\bar x)^2}}{n-1}[/tex] .
What do you mean by sample?Sampling is the process of choosing a portion of a statistical population to estimate attributes of the entire population in statistics, quality control, and survey methods. Statisticians try to get samples that are typical of the population under consideration.
What is mean and standard deviation?The arithmetic mean, also known as the arithmetic average or simply the mean or average, is the sum of a set of numbers divided by the total number of numbers in the set. The collection frequently consists of a series of findings from a survey, experiment, or observational study.
The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.
sample size =n .
[tex]\sum x[/tex] = sum of sample data.
[tex]\bar x = \frac {\sum x}{n}[/tex] (sample mean)
sample standard deviation(s) = [tex]\sqrt \frac{\sum {(x-\bar x)^2}}{n-1}[/tex]
[tex]variance = standard deviation ^2[/tex]
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A game cube is numbered 1 through 6. Cory rolls the cube 150 times. How many times should Cory expect the cube to land on an even number?
Answer:
75
Step-by-step explanation:
A 23.7-foot tall flagpole casts a 42-foot shadow. What is the angle that the sun hits the flagpole? Express your answer in DMS
Answer:
60.6°
Step-by-step explanation:
Using trigonometry :
Opposite = Height of shadow = 42 feets
Adjacent = height of flagpole = 23.7 feets
Tan θ = opposite / Adjacent
Tan θ = height of shadow / height of flagpole
Tan θ = 42 / 23.7
Tan θ = 1.7721518
θ = tan^-1(1.7721518)
θ = 60.56
θ = 60.6°
the diagram shows a part of a regular 10 sided polygon
work out the size of the angle marked x
Answer:
b
Step-by-step explanation:
b
can anyone help me???
Answer: think A
Step-by-step explanation:
Triangle ABC has the following vertices:
· A(1,9)
B(11, -7)
C(-9,3)
Is triangle ABC a right triangle, and why?
Answer:
yes
Step-by-step explanation:
Answer:
No,
Step-by-step explanation:because △ABC doesn't have a pair of perpendicular sides.
For each triangle find the value of x
Answer:
x = 20
Step-by-step explanation:
The sum of the angles in a triangle is 180. A right triangle has one angle of 90. Thus, the sum of the other two angles will be 90. So, 90+31 = 121 and 180-121 = 59. (3x-1) = 59. Solve for x. This would mean that x would be 20. 3*20 = 60 and 60-1 = 59. All the angles add together would get 180: 59+90+31.
3.Between 10 A.M. and 11 A.M., 48 people came into Brad's store. 40 of
them made a purchase. What is the experimental probability that the next
person to come into the store will make a purchase? What is the
experimental probability the next person to come into the store will make a
purchase? *
O A.40/48
O B.48/48
C.8/48
D.40/88
Answer:
It would be A because if 40 came in it would be a 40% chance
PLEASE HEEEEEELP!!
Answer:
1 is 105°
2 is 75°
Step-by-step explanation:
75° and angle 2 are corresponding angles(equal)
angles on straight line sum up to 180°
let x be angle 1
x+ 75= 180
x =180-75
x= 105°
Answer:
1. is 105
2. 75 degrees
Step-by-step explanation:
the winning times in the 5km race for the USA Women's Runners from 1999 to 2004 are listed below in minutes which list shows the list from the fastest time to the slowest time.
Answer:
I dont see the answer choices dog
NO SENDING VIRUS LINKS
During his geometry class, Marvin draws a circle with a compass.
The circle has a diameter of 7 inches.
22
What is the circle's circumference? (Use =
7
Round your answer to the nearest inch.
Answer:
inches.
What’s the answer for TS? (Arc measure)
NO LINKS!
angle TS = 74°
Straight line is 180°, so add PT and SR
(64+42 = 106)
Subtract 180 from 106, you get 74 :)
What's the x plz help
Answer:
The answer for x is ten
I just don’t get it, please help me.
Answer:
Answer in the image below \/
Step-by-step explanation:
PLS help with this immediately no links or guesses
Answer:
B all real numbers greater than 0
Ethan swam 3.6 miles on Monday and 2.75 miles on Tuesday. How many total miles did Ethan swim on both days?
Answer:
6.35
Step-by-step explanation:
you have to add 3.6 + 2.75
Answer:
6.35 miles (give brainliest)
Step-by-step explanation:
I need to know both of the questions please!
Answer: x=10 and angle RST is 75 degrees
Step-by-step explanation:
What is the length of the missing leg? help me pleaseee die in 5 mins
Answer:
A is 21!!
Step-by-step explanation:
Brainliest Please!
help please!!!
Find the value of x.
13
13
X!
24
Answer:
x = 5 units
Step-by-step explanation:
since it is an isosceles triangle, the perpendicular "x" bisects the base (24) into two units of 12.
using the Pythagorean theorem:
x² = 13² - 12² = 169 - 144 = 25
x = √25 = 5
find the square rootV 196
Answer:
The answer is 14
Step-by-step explanation:
The square root 196
√196 = 14
Thus, The answer is 14
-TheUnknownScientist
Border fencing costs $2.89 per package, and each package will fence a length of 8 feet.
What will the cost be to buy fencing to go around the triangular flower bed?
$49.13
$23.12
$390.15
Answer:
$23.12
Step-by-step explanation:
you'll need 3 sides so take 8×2.89
answer is $23.12
A box contains four equal-sized cards labeled 1 , 3, 5, and 7. Tim will select one card from the box. What is the probability that Tim will select a card labeled 3?
Answer: 1/4
Step-by-step explanation:
Since the box box contains four equal-sized cards labeled 1 , 3, 5, and 7. The probability of selecting any number out of the four numbers will be 1/4 if they are selected once.
If Tim selects one card from the box, the probability that Tim will select a card labeled 3 will be: = 1/4
This is because 3 only occurs once and there are 4 numbers in total.
The measure of ∠ABD is (0.18x+56)° and the measure of ∠CBD is (0.07x+46)°. Find the value of x.
Answer:
x = 312
Step-by-step explanation:
We know that ∠ABD and ∠CBD are supplementary, meaning their measures add up to 180°. We can use this knowledge to put both measures into an equation.
[tex](0.18x+56) + (0.07x+46)= 180[/tex]
Simplify.
[tex]0.18x+56 + 0.07x+46= 180[/tex]
Simplify.
[tex]0.25x + 102 = 180[/tex]
Subtract 102.
[tex]0.25x = 180 - 102[/tex]
Simplify.
[tex]0.25x = 78[/tex]
Divide by 0.25
[tex]x = \frac{78}{0.25}[/tex]
Simplify.
[tex]x = 312[/tex]
Pisces is replacing paving stones for her inground pool. Her pool is 10m by 5m and is surrounded by a 1 1/2 border of paving stone. If each paving stone was 25 cm by 40 cm, in theory, how many paving stones will she need?
Answer:
The number of paving stones she needs is 540 paving stone
Step-by-step explanation:
The given dimensions of Pisces' inground pool = 10 m by 5 m
The thickness of the border surrounding the pool = 1 1/2
The dimensions of each paving stone = 25 cm by 40 cm = 0.25 m by 0.4 m
The length dimension of the pool and border = 10 + 2 × 1 1/2 = 13 m
The width dimension of the pool = 5 + 2 × 1 1/2 = 8 m
The total area of the paving stone, [tex]T_A[/tex] = Area of pool + border - Area of pool
∴ [tex]T_A[/tex] = 13 m × 8 m - 10 m × 5 m = 54 m²
The total area of the paving stone = 54 m²
The area of each paving stone, [tex]A_{EP}[/tex] = 0.25 m × 0.4 m = 0.1 m²/paving stone
The number of paving stones she needs, n = (The total area of the paving stone)/(The area of each paving stone)
∴ n = 54 m²/(0.1 m²/paving stone) = 540 paving stone.
Identify the distance between points (3,7,1) and (9,6,7), and identify the midpoint of the segment for which these are the endpoints. Round to the nearest tenth, if necessary.
Answers:
A- d ≈ 8.5 units; M (12, 13, 8)
B- d ≈ 73 units; M (6, 6.5, 4)
C- d ≈ 8.5 units; M (6, 6.5, 4)
D- d ≈ 7.6 units; M (6, 6, 4)
Answer:
d ≈ 8.5 units; M (6, 6.5, 4)
Step-by-step explanation:
Got a lucky guess. Hope this helps:)
1/2 minus 1/6 equals.
Answer:
1/3
Step-by-step explanation:
Andy has 13 coins made up of quarters and half dollars, and their total
value is $5.00. How many quarters does he have?
Plsss helppppppp:))))))
Answer:
5
Step-by-step explanation:
because it is asking what minus 9 is equal to -4
Answer:
5
Step-by-step explanation:
5 - 9= - 4
I don't know if this is confusing but you could also just subtract 5 from 9 (9-5) which is 4 and then put a - in front of it
The length of three sides of a triangle are 3x+1/2 ,2x+1/4 , and x +1/2 .the perimeter of the triangle is
Answer:
Step-by-step explanation:
Just add the three sides P = side1 + side2 + side3
Don't let the 'x' terms confuse you, they are just numbers times 'x'
P = 3x+1/2 + 2x+1/4 + x+1/2
= 6x + 5/4
P = 6x + 1&1/4
Which expression is a factor of 9x^2-4x+1 ( ps ^2 is an exponent)
Answer:
The discriminant b2−4ac < 0, the equation has no real number solutions, it has complex solutions
Step-by-step explanation:
9x² - 4x + 1 = 0 ax² + bx + c = 0
The discriminant: b² - 4ac = (-4)² - 4*9*1 = 16 - 36 = -20
b2−4ac < 0, the equation has no real number solutions, it has complex solutions
Simplify x1/3 (x1/2 + 2x2)
Answer:the third one
Step-by-step explanation:
Answer: x5/6+2x7/3
Step-by-step explanation:
I took the test