Shape, Center and Spread

Gabriella’s quiz grades are shown below.
88, 92, 92, 96, 98
Gabriella scored a 20 on her sixth quiz. What effect does this score have?

• The low score causes the median to increase.

• The low score causes the median to decrease.

• The low score causes the mean to increase.

• The low score causes the mean to decrease.

What is the interquartile range?

• 4

• 6

• 2

• 8

What is the range of the data?

• 100

• 110

• 50

• 150

The histogram shows the birth weights of 100 new born babies.  How many babies weighed 8 pounds or more?

• 22

• 23

• 30

• 45

• 136
• 150
• 156
• 153

The number of text messages that Isaac received each day for a week is shown: 47, 49, 54, 50, 48, 47, 55
What is the mean and median

• Mean=49
  Median=54

• Mean=49 
  Median=50

• Mean=50 
  Median=54

• Mean=50
  Median=49

• only 2nd period is symmetric
• both plots are symmetric
• 5th period is bimodal
• 2nd period's center is higher than 5th period

• the spread of 5th period is greater than 2nd period
• the spread of 2nd period is greater than 5th period
• 5th period is skewed right

• 2nd period has a gap at 16
• 5th period has an outlier
• 5th period's center is higher than 2nd period
• 2nd period's spread is greater than 5th period's spread

• only Hayes Road is symmetric
• Hayes Road's center is at 60
• Jefferson Road's center is at 55
• only Jefferson Road is symmetric