9-17 TEST - Unit 2 Descriptive Statistics

The table of frequency above represent the grades earned by 144 students in World History. 

What is the relative frequency of those who earned a B? Round to the nearest hundredth.

• $0.76$

• $0.22$

• $0.32$

• $0.44$

The table of frequency above represent the grades earned by 144 students in World History. 

What is the cumulative frequency of those who earned at least a C? Round to the nearest whole number.

•  $34$  

•  $64$ 

•  $110$ 

•  $144$ 

A baby furniture store has number a number of different dressers. The table shows the number of dressers and their heights.

Which histogram correctly represents the information in the given table?

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Tags

CCSS.6.SP.A.2

CCSS.6.SP.B.4

A baby furniture store has number a number of different dressers. The table shows the number of dressers and their heights.

What is the best description for the shape of data?

• Skewed left

• skewed right

• symmetric

• uniform

Nine students were asked how many times each week they buy lunch at school. The results shown above.

Which of the following dot plots correctly represents this data?

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Nine students were asked how many times each week they buy lunch at school. The results shown above.

What is the shape of the data?

• Skewed right

• Skewed left

• Symmetric

• Uniform

The table above displays the result of a survey of car preferences of a sample of adults. Use the data in two-way frequency table above in selecting the correct interpretation of the conditional relative frequency  $\frac{135}{180}.$   

• 135 of the total number of people who prefer SUVs were females

• 135 out of  the 180 people surveyed prefer SUVs

• 135 out of the 180 females surveyed prefer SUVs

The table above displays the result of a survey of car preferences of a sample of adults. Use the data in two-way frequency table above in selecting the correct interpretation of the conditional relative frequency  $\frac{135}{156}.$   

• 135 of the 156 people who prefer SUVs were females

• 135 out of  the 156 females surveyed prefer SUVs

• Out of the 156 surveyed, 135 are females

Above are the boxplots representing two sets of data.

Select all the statements that correctly compare the two sets of data.

• The two distributions have the same shape.

• Both medians are between 60 and 70.

• At least 25% of both data sets are below 60.

• At least 25% of both data sets are above 80.

• The maximum of each data set is the same.

Jessica surveyed her classmates to find out how many posts the make, on average, on social media in a normal day. The following data set shows her results.

a. Find the value of the mean b. value of the median

c. value of the range d. IQR

• mean = 10.07
  median = 10
  range = 3
  IQR = 12

• mean = 10.07
  median = 10.07
  range = 12
  IQR = 12

• mean = 10.07
  median = 10
  range = 12
  IQR = 3