Question

test is designed so that the mean is 100 and the standard deviations for the population of normal adults Find the sample se necessary to estimate the mean I score of statistics students such that it can be said with confidence that the sample en is within 60 points of the true mean Assume that a 25 and determine the required samples using technology Thonetermine this is a reasonable sample sice for a real world calculation required samplese Round up to the nearest Integer) id it be reasonable to sample this number of students? No This number of io test scores is a large number Yes This number of test scores is a fairly small number No This number of test scores is a small number Yes. This number oftest score is a type number to select your answers O Search for anything ADO TISSAM (11220 200

Answer 1

Margin of error (e) = 6
Standard deviation (s) = 25
Confidence interval(in %) = 99
z @ 99.0% = 2.5758

Since we know that

S n Margin of error = 2 25.0 6.0 = 2.5758 25.0 Vn= 2.5758- 6.0 Vn = 10.7325 n= 115.1866 115

OPTION B: Yes, The number of IQ test scores is a fairly small number

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