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Unformatted text preview: 10. For A population has a mean of u = 60 and a standard deviation of o = 24. Find the z score corresponding to each of the following samples: a. M= 63 for a sample of n = 16 scores b. M= 63 for a sample of n =36 scores c. M= 63 for a sample of n = 36 scores the z-scores are (M - ) / (/sqrt(n)) a) (63-60)/(24/sqrt(16)) = 1/2 b) (63-60)/(24/sqrt(36))=3/4 c) (63-60)/(24/sqrt(64))=3/3=1 14. The population of IQ scores forms a normal distribution with a mean of h = 100 and a standard deviation with a mean of 0 = 15. What is the probability of obtaining a sample mean greater than M =105, a. for a random sample of n = 9 people? b. for a random sample of n = 36 people? z = (x - )/(/n) (a) z = (105 - 100)/(15/9) = 1 20.A normal shaped distribution u=80 and tau=15. a)sketch the distribution of sample means for samples of n = 25 scores from this population u=80 tau=15/sqrt n = 15/5 = 3...
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