Asked by Jessie
Use the following information to answer the following questions. IQ is measured with scores that range from 0-200. Thea mean is 100 and the standard deviation in the population is 15.
What is the probability that a randomly chosen person has an IQ of 115?
Suppose you have a SRS of 9. What is the probability that the sample will have an average IQ of 115?
What is the probability that a randomly chosen person has an IQ of 115?
Suppose you have a SRS of 9. What is the probability that the sample will have an average IQ of 115?
Answers
Answered by
PsyDAG
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score at the ordinate.
Z = (score-mean)/SEm
SEm = SD/√n
Use same table.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score at the ordinate.
Z = (score-mean)/SEm
SEm = SD/√n
Use same table.
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