of the 230 d. Both n n2 5 and (1 -m 2 5 are true. A sample of 66 observations wi
ID: 3357913 • Letter: O
Question
of the 230 d. Both n n2 5 and (1 -m 2 5 are true. A sample of 66 observations will be taken from an infinite populaticn. The will be greater than 0.1768 is b. 0.0778 d 0 9222 The standard error of the mean 0,4222 38 d) All of the above is 900, The standard error of the mean is approximately 40. If the sample mean is 20 and the margin of error is 5, then the interval estimate is 38.582 i e of A random sample of 100 credit sales in a department store showed an average sal S120.00. From past data, it is known that the standard deviation of the population is $40.00 a. I. The population variance is c. Determine the standard error of the mean. with a 95% confidence level, determine the margin of error What is the 95% confidence interval of the population mean?Explanation / Answer
36) Option D. Both are true
37) n = 66, p = 0.12, mean = 0.12*66 = 7.92
std. dev, sd = sqrt(66*0.12*0.88) = 2.64
P(X > 0.1768866) = P(X > 11.6688) = 1 - P(X < 11.6688) = 1 - P(Z < (11.6688-7.92)/2.64) = 1 - P(Z < 1.42) = 0.0778
Option B
38) Option D. ALl of the above
39) finite population correction, fpc = sqrt [ (N - n) / (N - 1) ]
SE = [ (standard deviation)/sqrt(n) ] * fpc
SE = [300/sqrt(225)]*sqrt[(500-225)/(500-1)] = 14.8473
40) (15,25)
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