Statistics Practice
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practice_for_exam_through_12.2.docxPractice for Exam through 12.2
Question 1 (1 point)
7C7
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5C5
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6C6
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Given P(A and B) = 0.30, P(A) = 0.93, and P(B) = 0.32 are events A and B independent or dependent?
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Dependent |
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Independent |
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Given P(A) = 0.28, P(B) = 0.98, and P(A or B) = 0.47, are events A and B mutually exclusive?
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Yes, they are mutually exclusive |
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No, they are not mutually exclusive |
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Given P(E or F) = 0.20, P(E) = 0.44, and P(F) = 0.33, what is P(E and F)?
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Gwen is interested in the effect of bananas on the speed and endurance of high school cheerleaders. She recruits 20 cheerleaders from high schools in California. Each cheerleader was asked to run as many laps as they could in 20 minutes on a standard 100M track. Two weeks later the same cheerleaders were asked to run as many laps as they could in 20 minutes, but were asked to eat a banana 10 minutes prior to starting. The number of laps completed (to the nearest quarter lap) was recorded. What is the sample of this study?
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The 20 cheerleaders measured |
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All cheerleaders in California |
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Banana aficionados |
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All cheerleaders in California who regularly eat bananas |
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Frequency |
10 |
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9 |
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0 to 9 |
10 to 19 |
20 to 29 |
30 to 39 |
40 to 49 |
50 to 59 |
The table above lists the frequency of "jazz hands" by performers in an all Professor rendition of Cats this past weekend. What is the relative frequency of the class "0 to 9"?
Answer in decimal form. Round to 3 decimal places as needed.
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Frequency |
10 |
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9 |
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0 to 9 |
10 to 19 |
20 to 29 |
30 to 39 |
40 to 49 |
50 to 59 |
The table above lists the frequency of "jazz hands" by performers in an all Professor rendition of Cats this past weekend. What is the relative frequency of the class "30 to 39"?
Answer in decimal form. Round to 3 decimal places as needed.
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Compute the median of 12, 53, 25, 53, 40.
Round to 2 decimal places as needed.
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Compute the median of 41, 48, 35, 13, 60, 23
Round to 2 decimal places as needed
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Compute the median of 12, 53, 24, 60, 40, 41
Round to 2 decimal places as needed
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