Summary Statistics

Jean's scores on all five mathematics tests were 98, 97, 99, 98, and 96. Her scores on all five English tests were 78, 84, 95, 72, and 79. Which statement is true about the spread for these scores?

• More information is needed to determine the spread

• The spread for both sets of scores are equal.

• The spread for the English scores is greater than the spread for the math scores.

• The spread for the math scores is greater than the spread for the English scores.

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Which of the following measures the spread of data?

• Mean

• Median

• Mode

• Interquartile range

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CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

The balance of the data is represented by the

• mean

• median

• range

• standard deviation

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CCSS.HSS.ID.A.2

CCSS.HSS.MD.A.2

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The median test scores is 65. What does this tell us?

• the balance of the data is 65

• 50% of the scores are more than 65

• One standard deviation is 65

• The highest score is 65

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CCSS.HSS.ID.A.3

The class mean is 85

Another student's score was added and it was a 65. What will happen to the mean?

• It will decrease

• It will increase

• It will stay the same

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CCSS.HSS.ID.A.2

CCSS.HSS.MD.A.2

If 32, 40 and 30 are added to the test scores, what will happen to the IQR?

• It will increase

• It will decrease

• It will stay the same

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CCSS.HSS.ID.A.2

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The lower quartile of a set of numbers is 6. This means that...

• 50% of the numbers in the data set are more than 6

• 25% of the numbers in the data set are more than 6

• 75% of the numbers in the data set are more than 6

• 100% of the numbers in the data set are more than 6

Spread is the ________, or difference, between least and greatest values.

• Mean

• Median

• Mode

• Range

Which of the following best describes the process of finding the interquartile range for a set of data?

• ADD the biggest and smallest numbers

• Place the number in order from least to greatest then find the middle.

• Find the difference between the Maximum and the Minimum.

• Subtract Q3 from Q1

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CCSS.HSS.ID.A.3

The dot plot represents the distribution of wages earned during a one-week period by 12 college students. What is the median? Interpret this value based on the situation.

• $119; Most students made $119 per week.

• $118; Half of the students earned $118 or less and half of the students earned $118 or more.

• $118; The average weekly wage was $118.

• $119; Some of the students earned less than $119 and some of the students earned more than $119

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CCSS.HSS.ID.A.1