Attempt 1 Question 7 (3 points) A random variable is normally distributed. It ha
ID: 3367724 • Letter: A
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Attempt 1 Question 7 (3 points) A random variable is normally distributed. It has a mean of 245 and a standard deviation of 21 a.) For a sample of size 10, state the mean of the sample mean. b.) For a sample of size 10, state the standard deviation of the sample mean (the standard error of the mean"). c.) For a sample of size 35, state the mean of the sample mean. d.) For a sample of size 35, state the standard deviation of the sample mean (the "standard error of the mean"). e) TRUE or FALSE: As sample size increases, standard devlation of the sample mean (the "standard error of the mean") also increases. For parts (a) through (d), enter answer in decimal form rounded to nearest thousandth (3 places after decimal). Examples of correctly entered answers: 0.000 o.004 0.080 1.200 0.594 13.000 For part (e): Enter TRUE or FALSE MacBook Pr 3 4 5 6 8 9 0Explanation / Answer
a)
mean of sample mean =population mean =245
b)
std deviaiton of sample mean =population std deviaiton/(n)1/2 =21/sqrt(10)=6.641
c)
mean of sample mean =population mean =245
d)
std deviaiton of sample mean =population std deviaiton/(n)1/2 =21/sqrt(35)=3.550
e)
False
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