Statistics review

What makes this a statistical question? Emily is studying forests; she writes the following statistical question. How tall are the trees in the Osceola National Forest?

• It has only one correct response.

• It expects variability in the data.

• Its answer is expressed as a percentage.

• It provides answers about the different species of trees in the forest.

Which measurement best describes the center of the data set shown below? {1, 1, 4, 5, 6, 7, 8, 9, 26}

• median

• mean

• mode

• range

Which of the following sets represents the outlier(s) of the data? Mr. Turner asked his students how many siblings they have. He displayed the data in the bar graph below.

• {0, 6}

• {4, 5}

• {2}

• {6}

Mr. Logan works for a local delivery company. The set of data below represents the number of miles he drove each day over a period of eight days. {45, 67, 18, 13, 52, 52, 19, 62} Which statement describes the data set?

• It has a mean of 52.

• It has a range of 54.

• It has a mode of 41.

• It has a median of 45.

What is the mean of the set of data?

• C. 14

• B. 9

• D. 16

• A. 8

What is Ryan's median quiz grade?

• C. 93

• B. 91

• D. 96

• A. 90

Which statement is true?

A teacher was comparing two sets of quiz grades for a group of ten students.

Quiz 1: 70, 72, 76, 80, 84, 84, 88, 90, 96, 98
Quiz 2: 72, 76, 78, 82, 82, 86, 92, 96, 98, 100

• The mean and median are greater for Quiz 1 than for Quiz 2.

• The mean and median are greater for Quiz 2 than for Quiz 1.

• The mean is greater for Quiz 1 than Quiz 2 but the medians are the same.

• The mean is greater for Quiz 2 than Quiz 1 but the medians are the same.

What is the median number of siblings of Mrs. Rodriguez's students?

• 2

• 1

• 0

• 3

What is the median?

• C. 16

• B. 15

• A. 14

• D. 17

Ms. Jamison compared the test scores of her first period class to her second period class using dot plots. Which statement is true?

• The median test scores for first period and second period are the same.

• The median test score for second period is higher than the median for first period.

• The modes for each period cannot be determined.

• The mode for first period is the same as the mode for second period.