Measure of Center and Variability

For which group of data does the mean equal the mode?

• 4, 5, 5, 8

• 4, 4, 6, 6

• 4, 5, 6, 6

• 4, 5, 5, 6

The list below shows the number of words per minute students in Mrs. DeFelice's class typed last week:
42, 55 ,62, 39, 38, 70, 54, 56, 73.
Which would change the range from 35 to 38?

• A new student types 38 wpm

• The student that  typed 39 wpm moved

• A new student types 35 wpm

• The student that typed 73 wpm movedd

Here are the times (in minutes) that six students needed to finish a quiz:
10, 14, 15, 15, 14, 10
The Mean Absolute Deviation for this data is 2.
A seventh student took 8 minutes to finish the quiz.  We added his time to our data.  What will happen to the MAD?

• It will decrease because our range is bigger.

• It will increase because our range is bigger.

• It will not change.

• It will decrease because we have more numbers in our data set.

A data set consists of the numbers 2, 2, 5, 6 and 15.  Which statement is true for this data?

• median > mean

• mean = mode

• mode < median

• median = mode

What is the mean absolute deviation of her math scores?

• 5.4

• 6.4

• 7.8

• 8.8

Enzo’s mean score is 44. Zahra’s mean score is 38. How much greater is the mean absolute deviation for Zahra's scores than for Enzo's scores?

• 1.2

• 4.4

• 5.6

• 6.0

Which measures of center or variability are greater than 5 degrees? Select three choices.

• the mean of this week’s temperatures

• the mean of last week’s temperatures

• the range of this week’s temperatures

• the mean absolute deviation of this week’s temperatures

• the mean absolute deviation of last week’s temperatures

Theo recorded the means and mean absolute deviations of his language arts and Biology scores. He found the difference in the means of the scores of the two subjects. What is the approximate ratio of the difference in the means to each of the mean absolute deviations?

• 2

• 5

• 18

• 28

Joaquin and Trisha are playing a game in which the lower median wins the game. Their scores are shown below. Joaquin’s scores: 75, 72, 85, 62, 58, 91 Trisha’s scores: 92, 90, 55, 76, 91, 74 Which supports the conclusion that Joaquin won the game?

• Joaquin won because the median of his scores is 73.5 and the median of Trisha’s scores is 83.

• Joaquin won because the median of his scores is 83 and the median of Trisha’s scores is 73.5.

• Trisha won because the median of her scores is 73.5 and the median of Joaquin’s scores is 83.

• Trisha won because the median of her scores is 83 and the median of Joaquin’s scores is 73.5.