NeSA Data Analysis and Statistics 2

Question 1

A survey of 200 Nebraska students found that 50 students walk to school. What percentage walks to school?

Accepted Answer

25%

Answer

Percentage = (part / whole) × 100 = (50 / 200) × 100 = 25%.

Question 2

The range of a data set is 18. If the minimum value is 12, what is the maximum value?

Accepted Answer

30

Answer

Range = maximum − minimum, so maximum = minimum + range = 12 + 18 = 30.

Question 3

Which graph would best display the comparison of science test scores among five different classes?

Accepted Answer

Bar graph

Answer

A bar graph is best for comparing discrete categories (classes), using the height of bars to show differences in scores.

Question 4

A table shows quiz scores for 4 students: 88, 92, 76, and 84. What is the mean score?

Accepted Answer

85

Answer

Mean = sum of values / number of values = (88+92+76+84) / 4 = 340 / 4 = 85.

Question 5

In a frequency table, what does the 'frequency' column represent?

Accepted Answer

The number of times each value occurs

Answer

The frequency column in a table shows how many times each value or category appears in the data set.

NeSA - Nebraska State Accountability Practice Test