ALEKS Statistics and Probability 2

Question 1

What is the range of: 15, 22, 8, 31, 19?

Accepted Answer

23

Answer

Range = maximum - minimum = 31 - 8 = 23.

Question 2

A standard die is rolled. What is the probability of rolling a number greater than 4?

Accepted Answer

1/3

Answer

Numbers greater than 4 are 5 and 6, so P = 2/6 = 1/3.

Question 3

In a class of 30 students, 12 prefer math. What percentage prefer math?

Accepted Answer

40%

Answer

12/30 × 100% = 40%.

Question 4

What type of correlation is shown when one variable increases as the other decreases?

Accepted Answer

Negative correlation

Answer

A negative correlation means one variable increases while the other decreases.

Question 5

Which display best shows the distribution of a large data set?

Accepted Answer

Histogram

Answer

A histogram is designed to display the frequency distribution of continuous numerical data.

ALEKS - Assessment and Learning in Knowledge Spaces Practice Test