Statistics Quiz

Given the data set 6, 12, 14, 14, 15, 16, 16, 16, 25, 30, which number is NOT an outlier?

• 6

• 12

• 25

• 30

The data set 6, 8, 12, 15, 18, 20, 22, 26, 28, 30, 35 is represented in a box plot. Which is correct?

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The box plot shows the scores on the last quiz in Mrs. Baker’s and Mrs. Cartee’s classes.

• Mrs. Baker’s class was more successful because her interquartile range was less spread out.

• Mrs. Cartee’s class was more successful because she had the greater total spread.

• Mrs. Baker's class was more successful because her class has a median of 84.

• Mrs. Baker’s class was more successful because her class’s upper quartile was the same as Mrs. Cartee’s upper quartile.

The dot plot shows the number of miles a group of friends ran last week while training for a 5K run. If one more person added their total of 18 miles to the graph, what would happen?

• The mean would increase, and the median would stay the same.

• The median would increase, and the mean would stay the same.

• The mean would decrease more than the median, but both would decrease.

• The mean would increase more than the median, but both would increase.

The box plot represents the average weekly temperatures for 2 different cities over the last 11 weeks. By looking at the plots, Haley says that the two means are about 8 degrees apart. What is true about Haley’s statement?

• She is correct because the medians are 4 degrees apart, which means the means are half of that, or 4 degrees.

• She is correct because the max temperatures of the two cities are the same

• She is not correct because the means are both 77.

• She may not be correct because the means cannot be determined from a box plot.

The box plot shows the number of hours 2 groups of students played video games last weekend.

• The median is the best measure because both distributions are right-skewed.

• The mean is the best measure because both distributions are right-skewed.

• The median is the best measure because both distributions are symmetric.

• The mean is the best measure because both distributions are symmetric.

Amber planted a sunflower in her garden and measured the height every week. The chart shows her data. What is the line of best fit?

• y=4.35x+4.92

• y=4.92x+4.35

• y=0.996x+4

• y=4x+0.996

Amber planted a sunflower in her garden and measured the height every week. According to the line of best fit, about how tall would the sunflower be in the 10th week?

• 47

• 48

• 49

• 50

The box plot represents the average weekly temperatures for 2 different cities over the last 11 weeks. What is the difference in the medians?

• 3

• 4

• 8

• 10

Cale gathers data about the number of people living in each house on his street and the number of cars they own.

• It is a weak positive correlation, and is not likely causal.

• It is a weak positive correlation, and is likely causal.

• It is a strong positive correlation, and is not likely causal.

• It is a strong positive correlation, and is likely causal.