Comparative Inferences with Dot Plots

What is the mode for this data set? Remember the mode is the most common or most frequent data.

• 55

• 60

• 70

• 75

What is the range for this data set? Remember to subtract the minimum value from the maximum value.

• 10

• 15

• 25

• 30

What is the median for this data set? Remember to rank the data in order from least to greatest, then find the median, which is the middle number in the ranked set of data.

• 55

• 60

• 70

• 75

What is the mean (average) for this data set? Remember to add all of the data then divide by the total number of data collected.

• 60

• 62

• 64

• 66

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.

Every Friday, the French Club sells bagels and the Spanish Club sells doughnuts to raise money for charity. The double dot plot shows how many items the clubs sell over several weeks. Which club typically sells more items?

• French Club

• No inference can be made from the graph.

• Spanish Club

• Both clubs sell the same number of items.

The double dot plots show the average wait times in minutes for two popular rides at an amusement park. Compare the measures of center and variation, which ride typically has a longer wait time?

• No inference can be made from the graph.

• Topsy Turvy

• The wait times are the same for both rides.

• Rocket Blast

What is the mode for this data set? Remember the mode is the most common or most frequent data.

• 150

• 170

• 180

• 190

What is the median for this data set? Remember to rank the data in order from least to greatest, then find the median, which is the middle number in the ranked set of data.

• 140

• 150

• 170

• 180

What is the mode for this data set? Remember the mode is the most common or most frequent data.

• 66

• 78

• 60

• 72