I am having a very hard time in my statistics class. I would really appreciate your help and how you got the answer.
For a sample of n=45, find the probability of a sample mean being greater than 551 if the population mean is 550 and the population standard deviation is 3.7.
thanks so much!
For a sample of n=45, find the probability of a sample mean being greater than 551 if the population mean is 550 and the population standard deviation is 3.7.
thanks so much!
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sqrt 45 * 3.7 /45 = 0.551563 this is 1 SE
551-550 = 1
1/0.551563 = 1.8 Z above 50%, in the normal curve, you'd have about 4%
551-550 = 1
1/0.551563 = 1.8 Z above 50%, in the normal curve, you'd have about 4%