PRETEST: Measures of Center and Variability

Otis measured the heights of several sunflowers. He found that their heights were 2, 3, 3, 5, and 7 feet.

Otis found that the mean was 4 feet and the range was 5 feet.

Which numbers describe the center and spread of this data set?

• 4 feet describes the center, and 5 feet describes the spread.

• 5 feet describes the center, and 4 feet describes the spread.

• 7 feet describes the center, and 2 feet describes the spread.

• 2 feet describes the center, and 7 feet describes the spread.

Otis measured the heights of several sunflowers. He found that their heights were 1, 4, 6, 9, and 10 feet.

Otis found that the mean was 6 feet and the range was 9 feet.

Which numbers describe the center and spread of this data set?

• 6 feet describes the center, and 9 feet describes the spread.

• 9 feet describes the center, and 6 feet describes the spread.

• 1 foot describes the center, and 10 feet describes the spread.

• 10 feet describes the center, and 1 foot describes the spread.

Orion measured the heights of several sunflowers. He found that their heights were 2, 5, 6, 8, and 9 feet.

Orion found that the mean was 6 feet and the range was 7 feet.

Which numbers describe the center and spread of this data set?

• 6 feet describes the center, and 7 feet describes the spread.

• 7 feet describes the center, and 6 feet describes the spread.

• 2 feet describes the center, and 9 feet describes the spread.

• 9 feet describes the center, and 2 feet describes the spread.

Bella measured the heights of several wildflowers. She found that their heights were 2, 3, 4, 4, and 7 inches.

Which statement is false?

• The median of the data is 5 inches.

• The mean of the data is 4 inches.

• The range of the data is 5 inches.

• The median of the data is 4 inches.

Brad measured the heights of several wildflowers. He found that their heights were 3, 3, 4, 4, and 6 inches.

Which statement is false?

• The mean of the data is 3 inches.

• The mean of the data is 4 inches.

• The range of the data is 3 inches.

• The median of the data is 4 inches.

Becca measured the heights of several wildflowers. She found that their heights were 2, 3, 3, 5, and 7 inches.

Which statement is false?

• The median of the data is 5 inches.

• The mean of the data is 4 inches.

• The range of the data is 5 inches.

• The median of the data is 3 inches.

Sonya kept track of the number of hours she spent on homework each week for several weeks. She spent 6, 5, 5, 4, and 10 hours.

What is the mean number of hours that Sonya spent on homework each week?

• 6 hours

• 4 hours

• 5 hours

• 30 hours

Sara kept track of the number of hours she spent practicing piano each week for several weeks. She spent 4, 6, 7, 5, and 8 hours.

What is the mean number of hours that Sara spent practicing piano each week?

• 6 hours

• 4 hour

• 5 hours

• 30 hours

Skylor kept track of the number of hours she spent practicing guitar each week for several weeks. She spent 7, 3, 8, 7, and 5 hours.

What is the mean number of hours that Skylor spent practicing guitar each week?

• 6 hours

• 7 hours

• 5 hours

• 30 hours

Taylor kept track of the number of hours that he spent at the media center each week for several weeks. He spent 8, 2, 5, 10, and 5 hours.

What is the median number of hours that Taylor spent at the media center each week?

• 5 hours

• 6 hours

• 8 hours

• 30 hours