CAASPP Data Analysis 4

Question 1

A data set has Q1 = 15 and Q3 = 35. Which value would be considered an outlier using the 1.5 × IQR rule?

Accepted Answer

70

Answer

IQR = 20; upper fence = 35 + 30 = 65, so 70 exceeds the fence and is an outlier.

Question 2

A set of test scores has a range of 45. What does the range tell you?

Accepted Answer

The spread between the highest and lowest scores

Answer

Range = maximum − minimum, so it describes the total spread of the data set.

Question 3

In a stem-and-leaf plot, the stem 4 has leaves 1, 3, 7. What values do these represent?

Accepted Answer

41, 43, 47

Answer

In a stem-and-leaf plot, each leaf is combined with its stem: 4|1 = 41, 4|3 = 43, 4|7 = 47.

Question 4

A student records daily high temperatures for a week: 72, 75, 68, 80, 72, 79, 72. What is the mode?

Accepted Answer

72

Answer

72 appears three times, more than any other value, making it the mode.

Question 5

A circle graph (pie chart) shows that 30% of students prefer math. If there are 400 students total, how many prefer math?

Accepted Answer

120

Answer

30% of 400 = 0.30 × 400 = 120 students prefer math.

CAASPP - California Assessment of Student Performance and Progress Practice Test