Probability and Statistics Review

Question 1

A die has an experimental probability of 0.3 for rolling a 5. From 500 rolls, how many 5s will there be?

Accepted Answer

150

Question 2

What is the median?

Accepted Answer

71

Question 3

Choose the incorrect statement

Accepted Answer

The interquartile range is 20

Question 4

A letter is randomly chosen from the word XYLOPHONE. The probability that it is an O is:

Accepted Answer

\frac{2}{9}

Question 5

The values of x and y in this two-way table are:

Accepted Answer

x = 12, y = 8

Question 6

Which percentage of competitors finished in better than 40 minutes?

Accepted Answer

50%

Question 7

If Jacob achieved scores of 12, 9, 7, and 12 on his tests. What should his next score be to get an average of 11?

Accepted Answer

15

Question 8

What is the probability of selecting a green ball and a red ball without replacement?

Accepted Answer

\frac{1}{3}

Question 9

Which shaded region represents A and B?

Accepted Answer

A

Questions 9