Best Measure of Center and Review

What is the best measure to describe the data set : 6, 35, 8, 20, 6, 16, 7?

• mean

• median

• mode

You sent the same email to 10 of your friends. The number of hours it took them to respond was: 1, 1, 1, 2, 2, 3, 4, 5, 5, and 25. What are the mean, median and mode of this date?

• 49, 2.5, 1

• 4.8, 2, 1

• 4.8, 2.5, 1

• 4.9, 2.5, 1

Which is the best measure of center best describes the data set 1, 1, 1, 2, 2, 3, 4, 5, 5, and 25?

(a)  

What did the outlier do to the mean and median in the data set 1, 1, 1, 2, 2, 3, 4, 5, 5, and 25?

• Nothing

• They were both greater with the outlier.

• They were both less with the outlier.

Find the median of that data on this frequency table.

• 20

• 45

• 30

• 18

What 3 values could be entered for Wednesday, Thursday, Friday to give you a MEAN of 7?

• 9,6,9

• 2,3,5

• Any 3 numbers that add up to 20.

• All sevens

If there is an outlier in your data (a point very far from the other data, or a very long whisker), what is the best measure of center to use and why?

• Median is best because the outlier skews the data.

• Mean is best because the outlier doesn't skew the data.

• Mode is always the best measure of center because it shows the most.

What is the mean of the data, rounded to the nearest tenth?

• 6.0

• 8.0

• 9.3

• 6.8

What is the mean of this data, and what is a general observation you can make?

• 80, most students scored higher than 80

• 85.83, most students score 80 or higher

• 80, most students scored lower than 80

• 85.83, most students scored lower than 80

• Mean will decrease.

• Mean will increase.

• Mean will stay the same.