A1 Basic Statistics Review

Match the vocabulary with the definitions

• mode(s)

• 
• mean

• 
• lower extreme

• the smallest value

  (minimum)

• upper extreme

• the most occurring value(s)

• median

• the largest value

  (maximum)

Given the data set

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

find each value.

• median

• 12

• mode(s)

• 13

• mean

• 25

• lower extreme

  (minimum)

• 10

• upper extreme

  (maximum)

• 4

Match the vocabulary with the definitions

• lower quartile

• the median of the lower half (Q1)

• box-and-whisker plot

• the difference between the maximum and the minimum

• interquartile range (IQR)

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

• upper quartile

• the median of the upper half (Q3)

• range

• 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

• 6

• interquartile range

• 10

• lower quartile

  (Q1)

• 21

• upper quartile

  (Q3)

• 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.

• 7

• How many students scored 70 or better?

• 52

• Which test score occurred most often?

  What is the mode of this data set?

• 74

• How many students scored less than 70?

• 13

• What is the lowest test score?

• 96

• What is the highest test score?

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