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Questions and Answers

(159 solutions)

Choose the correct label for the point on the boxplot represented by the question mark:

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Max...

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hoose the correct label for the point on the boxplot represented by the question mark:

unlabelled image

None of the above...

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Choose the correct label for the point on the boxplot represented by the question mark:

unlabelled image

Q3...

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A survey taken of 140 sports fans asked the question: "What is the most you have ever spent for a ticket to a sporting event?"

The five-number summary for the data collected is:

min = 85, Q1 = 130, Median = 145, Q3 = 150, Max = 250

Should the smallest observation be classified as an outlier?

YesGood job! The IQR is 150 - 130 = 20. Using the 1.5(IQR) criterion we get 130 - 1.5(20) = 100. Since the smallest observation of 85 is smaller than 100, it should be considered an outlier....

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A survey taken in a large statistics class contained the question: "What's the fastest you have driven a car (in miles per hour)?" The five-number summary for the 87 males surveyed is:

min = 55, Q1 = 95, Median = 110, Q3 = 120, Max = 155

Should the largest observation in this data set be classified as an outlier?

NoGood job! The IQR in this case is 120 - 95 = 25. Applying the 1.5(IQR) rule, we find: Q3 + 1.5(IQR) = 120 + 1.5(25) = 157.5, and, therefore, the largest observation, 155, should NOT be classified as an outlier. Note, however that in this case: Q1 - 1.5(IQR) = 95 - 1.5(25) = 57.5, and, therefore, t...

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Commute time to work

RatioThis is correct. This variable is quantitative where it is meaningful to talk about ratios between values (“Because of the accident, the commute home from work was twice as long as yesterday”)....

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Opinion about Hillary Clinton on a 0-100 scale (0 = extreme dislike to 100 = extreme like)

IntervalThis is correct. This is a quantitative variable where it is not meaningful to talk about ratios between values. If for person X the gives a value of 10 and person Y give a value of 30, it is not meaningful to say that person Y likes Hillary Clinton 3 times as much as person X. Also note tha...

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Opinion about Hillary Clinton on a 0-100 scale (0 = extreme dislike to 100 = extreme like)

IntervalThis is correct. This is a quantitative variable where it is not meaningful to talk about ratios between values. If for person X the gives a value of 10 and person Y give a value of 30, it is not meaningful to say that person Y likes Hillary Clinton 3 times as much as person X. Also note tha...

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Student’s major

NominalThis is correct. The major of a student is a categorical variable with no natural order to the categories....

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A Building’s height

RatioThis is correct. For this quantitative variable, it is meaningful to talk about ratios (building A is twice as tall as building Y)....

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