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Ksju [112]
2 years ago
15

A scientist was interested in studying if students political beliefs change as they go through college. Two hundred randomly sel

ected students were asked before they entered college if they would consider themselves liberal or conservative. Four years later, the same two hundred students were asked if they would consider themselves, liberal or conservative. The scientist decided to perform McNemar's test. The data is below. What is the null hypothesis? After College Before College Liberal Conservative Liberal 80 15 Conservative 20 85
A. -0.85 or 0.85

B. -0.39 or 0.39

C. -9.75 or -9.75

D. 1.96 or -1.96
Mathematics
1 answer:
swat322 years ago
7 0
You’re answer would be B love!
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A store marks up merchandise 40% for profit. If the store purchases the item for $12, what is the selling price?
gregori [183]

Answer:

b

Step-by-step explanation:

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What is 7•(6+2)² - 3² =​
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What is the radius of a hemisphere with a volume of 165\text{ cm}^3,165 cm 3 , to the nearest tenth of a centimeter?
DanielleElmas [232]

Answer:

4.3cm

Step-by-step explanation:

the radius of the hemisphere can be determined its volume

volume of a hemisphere = (2/3) x (n) x (r^3)

n = 22/7

r = radius

(2/3) x (22/7) x( r^3) = 165 cm^3

44/21 x r^3 = 165

divide both sides of the equation by 21/44

165 x 21/44

r^3 = 78.75

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r = 4.2863 cm

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4 0
3 years ago
The radius of a circle is 1 centimeter. What is the area of a sector bounded by a 90° arc?
AnnyKZ [126]

Answer:

Area = 0.785cm^2

Step-by-step explanation:

Given

r = 1cm -- radius

\theta = 90^{\circ}

Required

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Area = \frac{\theta}{360} * \pi r^2

Substitute values for r and \theta

Area = \frac{90}{360} * \pi * (1)^2

Simplify 90/360

Area = \frac{1}{4} * \pi * (1)^2

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Area = \frac{1}{4} * 3.14

Area = 0.785cm^2

8 0
2 years ago
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