A1 Basic Statistics Review

Match the vocabulary with the definitions

• mean

• the smallest value

  (minimum)

• mode(s)

• 
• lower extreme

• the largest value

  (maximum)

• upper extreme

• 
• median

• the most occurring value(s)

Given the data set

{4, 10, 10, 14, 4, 25, 15, 22, 16, 10}

find each value.

• mode(s)

• 4

• mean

• 10

• median

• 13

• upper extreme

  (maximum)

• 25

• lower extreme

  (minimum)

• 12

Match the vocabulary with the definitions

• lower quartile

• a data display that shows the range of data among the quartiles

• box-and-whisker plot

• the difference between the maximum and the minimum

• interquartile range (IQR)

• the median of the upper half (Q3)

• range

• the median of the lower half (Q1)

• upper quartile

• the difference between the upper quartile (Q3) and lower quartile (Q1)

Given the data set

{4, 10, 10, 14, 4, 25, 15, 22, 16, 10}

find each value.

• range

• 10

• upper quartile

  (Q3)

• 6

• lower quartile

  (Q1)

• 21

• interquartile range

• 16

According to the box-and-whisker plots shown,

what percent of the data in plot B is between 60 and 85?

• 25%

• 40%

• 50%

• 60%

• 75%

According to the box-and-whisker plots shown,

what percent of the data in plot A is greater than 80?

• 10%

• 15%

• 20%

• 25%

• 30%

According to the box-and-whisker plots shown,

what percent of the data in plot B is less than 85?

• 70%

• 75%

• 80%

• 85%

• 90%

Stem-and-Leaf Plots are a way of displaying data values.

Use this stem-and-leaf plot of test scores to match the questions and answers below.

• 13

• What is the highest test score?

• 7

• How many students scored less than 70?

• 96

• How many students scored 70 or better?

• 52

• What is the lowest test score?

• 74

• Which test score occurred most often?

  What is the mode of this data set?

Answer explanation

Stem-and-Leaf Plots are a way of displaying data values.

Use the back-to-back stem-and-leaf plot of humidity levels in the morning and afternoon to answer all three questions below.

What is the highest morning humidity?

​ (a)  

What is the lowest afternoon humidity?

​ (b)  

Does humidity tend to be higher in the morning or afternoon?

​ (c)  

• 59%
• 80%
• 88%
• 89%
• 51%
• morning
• afternoon
• evening
• 47%
• 87%

Answer explanation

Histograms are a way of grouping data by intervals.

The data in histogram shown represents scores on an algebra test.

Use this histogram to answer the three questions below.

How many students took the test?

​ (a)   students

How many students scored at least a 71 on the test?

​ (b)   students

Can you determine the highest grade from the histogram?

​ (c)  

• 33
• 26
• 7
• 8
• 12
• 18
• 15
• 21
• No
• Yes

Answer explanation