Compare Populations

The dot plots show the number of cheese and pepperoni pizzas that were sold each day over a 15-day period. What is the median and IQR of cheese and pepperoni pizzas sold?

• Cheese Pizza: Median=32 IQR=4

• Cheese Pizza: Median=30 IQR=4

• Pepperoni Pizza: Median=24 IQR=5

• Pepperoni Pizza: Median=22 IQR=5

If you compare the medians of each data set, who spends more time online?

• Seventh graders

• Eight graders

• Both grades spend an equal amount of time online.

• Impossible to determine form the data sets.

The dot plots show the weights of a random sample of fish from two lakes. Pick the statement that describes the variability of the samples.

• The variability of the weights of the fish in Lake S is greater than the variability of the weights of the fish in Lake R.

• The variability of the weights of the fish in the two lakes are about the same.

• The variability of the weights of the fish in Lake R is greater than the variability of the weights of the fish in Lake S.

• You cannot determine variability based on a dot plot.

The table shows the finish times of 30 runners in the 100-meter dash. Use the table to identify the inference that can be made by comparing the measures of center.

• Every runner ran faster last year as compared to this year.

• Most runners ran faster last year, on average, as compared to this year.

• The runners ran faster this year, on average, as compared to last year.

• Every runner ran faster this year as compared to last year.

Match the following inference with the statistical measure that best justifies the inference:"Half of the students in Grade 8 spent more time doing homework last week than at least half of the students in Grade 6."

• Mean

• Median

• Range

• Interquartile Range (IQR)

Match the following inference with the statistical measure that best justifies the inference:"The middle two quartiles of students in Grade 6 had greater variability in time spent doing homework last week than the middle two quartiles of students in Grade 8."

• Mean

• Median

• Range

• Interquartile Range (IQR)

These boxplots show the number of cookies eaten by students in our class. Based on the boxplots, which of the following statements about the cookies eaten is incorrect?

• 50% of the boys ate more cookies than all of the girls,

• All of the boys ate at least one cookie.

• Half of the girls ate two or more cookies.

• Just 25% of the girls ate three or less cookies.

Which car club has the higher median?

• Cruisers

• Car Hops

Which box and whisker plot has the highest median?

• Top plot

• Bottom plot

• The range of the data for Fun Fit is less than the range of the data for Greg’s Gym.

• The median for Greg’s Gym is less than the median for Fun Fit.

• The minimum attendance for Fun Fit is less than the minimum attendance for Greg’s Gym.

• The interquartile range for Greg’s Gym is greater than the interquartile range for Fun Fit.