Exercise 1: Practice Samples and Population Suppose that the population standard deviation (s) for a normally distributed standardized test of achievement is known to be 7.20. a. What would the standard error of the sample mean (o,) be if we were to draw a random sample o 16 test scores? b. Suppose that the above random sample yielded these observed scores: 656 12 5 10 11 13 12 10 9 20 23 20 28 18 i. Find the 95% confidence interval for the mean. Find the 99% confidence interval for the mean. 1.

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USING/APPLYING KNOWLEDGE (APPLICATION)
Exercise 1: Practice Samples and Population
Suppose that the population standard deviation (s) for a normally distributed standardized test of
achievement is known to be 7.20.
a. What would the standard error of the sample mean (o) be if we were to draw a random sample of
16 test scores?
b. Suppose that the above random sample yielded these observed scores:
656 12 5 10 11 13
12 10 9 20 23 20 28 18
Find the 95% confidence interval for the mean.
Find the 99% confidence interval for the mean.
ii.
Transcribed Image Text:USING/APPLYING KNOWLEDGE (APPLICATION) Exercise 1: Practice Samples and Population Suppose that the population standard deviation (s) for a normally distributed standardized test of achievement is known to be 7.20. a. What would the standard error of the sample mean (o) be if we were to draw a random sample of 16 test scores? b. Suppose that the above random sample yielded these observed scores: 656 12 5 10 11 13 12 10 9 20 23 20 28 18 Find the 95% confidence interval for the mean. Find the 99% confidence interval for the mean. ii.
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