Midterm Exam

1251 words 6 pages
Midterm Exam_MATH302
Question 1 of 25
0.0/ 1.0 Points
Which of the following statistics is not a measure of central location?

A.Interquartile range (CORRECT)

B.Median

C.Mode

D.Mean

Question 2 of 25
1.0/ 1.0 Points
If events A and B are mutually exclusive, then the probability of both events occurring simultaneously is equal to

A.0.0 (CORRECT)

B.1.0

C.0.5

D.any value between 0.5 and 1.0

Question 3 of 25
1.0/ 1.0 Points
The table below shows the preferences for elective courses of students who are undecided about their majors. Philosophy
Digital Art
Film Studies
Male
9
16
22
Female
6
18
14

What is the probability of randomly selecting a student who is female or prefers Digital Art?

A.84.7%

B.63.5%

What are the two dollar amounts, equidistant from the mean of \$30, such that 98% of all customer purchases are between these values? Place your answers in the blanks provided. Do not include a dollar sign. For example, 14.25 would be a legitimate entry.
Lower value 9.01
Upper value 50.99

Question 19 of 25
1.0/ 1.0 Points

Accepted characters:
The average hourly wage of workers at a fast food restaurant is \$6.50/hr with a standard deviation of \$0.45. Assume that the distribution is normally distributed. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than \$6.75? Place your answer, rounded to 4 decimal places, in the blank. For example, 0.1776 would be a legitimate entry. .2877 Answer Key: 0.2800|0.3000

Question 20 of 25
1.0/ 1.0 Points

Accepted characters:
A popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of \$30 and a standard deviation of \$9.
What are the two dollar amounts, equidistant from the mean of \$30, such that 90% of all customer purchases are between these values? Place your answers in the blanks provided. Do not include a dollar sign. For example, 14.25 would be a legitimate entry.
Lower value 15.15
Upper value 44.85

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