Probability and Statistics Semester Review

Question 1

What percent of the students scored 30 or higher on the quiz?

Accepted Answer

75%

Question 2

Look Below:

Accepted Answer

125,970

Question 3

Look below:

Accepted Answer

99.7%

Question 4

Find the probability that a student is male OR a non-nursing major.

Accepted Answer

2880/3605

Question 5

Look below:

Accepted Answer

3 cm

Question 6

Is the following a probability distribution?

Accepted Answer

Yes

Question 7

Look Below:

Accepted Answer

- $1.92

Question 8

Find the mean of the discrete random variable x.

Accepted Answer

6

Question 9

Look at image below:

Accepted Answer

40%

Question 10

C={1,4,6,8} D={2,6,9}. Find C⋃D.

Accepted Answer

{1,2,4,6,8,9}

Question 11

A={17,22,34,48} B={22,48,53,97}. Find A∩B.

Accepted Answer

{22,48}

Question 12

Look Below:

Accepted Answer

62.4%

Question 13

Which data set has a correlation coefficient of -0.93?

Accepted Answer

A

Question 14

Find r2 for the following data set. What percent of the variation can be explained?

Accepted Answer

0.74 ; 74%

Question 15

Find the equation of the regression line for the age and hours slept of six infants:

Accepted Answer

y = -1.27x + 14.78

Question 16

Look Below:

Accepted Answer

z = 3.21 ; yes

Question 17

Consider the following sets: A={2,5,7,8,4} B={5,8,11,23}. Find A/B.

Accepted Answer

{2,7,4}

Question 18

Look Below:

Accepted Answer

95,040

Questions 18