Question 7 Identify each numerical value by \"name\" (e.g., mean, variance) and
ID: 3134123 • Letter: Q
Question
Question 7
Identify each numerical value by "name" (e.g., mean, variance) and by symbol (e.g.,x).
(a) The mean height of 24 junior high school girls is 4'11".
24 = sample size = n; 4'11" = sample mean = x
24 = sample mean = x ; 4'11" = sample size = n
24 = sample variance = s2; 4'11" = sample size = n
24 = population variance = 2; 4'11" = population mean =
(b) The standard deviation for IQ scores is 16.
16 = sample mean = x
16 = population standard deviation =
16 = sample variance = s2
16 = sample size = n
(c) The variance among the test scores on last week's exam was 190.
190 = sample variance = s2
190 = population mean =
190 = sample size = n
190 = population standard deviation =
(d) The mean height of all cadets who have ever entered West Point is 69 inches.
69 = sample size = n
69 = population mean =
69 = population standard deviation =
69 = sample mean = x
You may need to use the Unit Normal or Z table to answer this question.
Explanation / Answer
a)
OPTION A: 24 = sample size = n; 4'11" = sample mean = x [ANSWER]
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b)
OPTION B: 16 = population standard deviation = [ANSWER]
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C)
OPTION A: 190 = sample variance = s2 [ANSWER]
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d)
As this is for ALL CADETS, then it is a population mean, so
OPTION B: 69 = population mean = [ANSWER]
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