For Nos. 6-10, use the set of scores given below.
83 72 87 79 82 77 80 73
86 81 79 82 79 74 74
6. What is the range of the scores?
A. 13
B. 14
C. 15 D.16
7. What is the value of the mean?
A. 78.8
B.79.2
C. 82.2 D.84.8
8. How many of the scores are greater than the mean?
A. 6
8.7
C.8 D.9
9. What is the upper quartile of the scores?
A. 79
B. 80
C.81 D.82
10. What position corresponds to the value of the upper quartile?
A 10th
B. 11th
C 12th
D. 13th
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Answer:
6.C
7.B
8.A
9.A
10.D
Step-by-step explanation:
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Answer:
6. C. 15
7. B. 79.2
8. B. 7
9. D. 82
10. C. 12th
Explanation:
6. Range = highest number - lowest number
7. Mean = total/# of values
8. Mean = 79.2, so numbers 83, 87, 82, 80, 86, 81, 82, are greater than the mean.
9. Arrange the numbers in order:
(72, 73, 74, 74, 77, 79, 79, 79, 80, 81, 82, 82, 83, 86, 87)
• 74 is the lower quartile
• 79 is the median
• 82 is the upper quartile
10. 82 is located at the 12th position.