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A simple random sample of 60 items resulted in a sample mean of 92. The population standard deviation is 16.
a. Compute the 95% confidence interval for the population mean (to 1 decimal).
b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
c. What is the effect of a larger sample size on the margin of error?
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The mean score for this sample is = 15.5. U a one-tailed z test with a = .05 to test the psychologist's prediction (include all elements as detailed in z-Test H
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What is the 92% confidence interval for the true mean score the 2017 GABC standardized test?
What is the probability that the mean height for the sample is greater than 64 ?inches? Assume s=2.85
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An experiment involves 17 participants. From these, a group of 5 participants is to be tested under a special condition. How many groups of 5 participants can be chosen, assuming that the order in which the participants are chosen is irrelevant?
if you want to be 95 confident of estimating the population mean to within a sampling error of plus or minus 6 and the
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Of the 293 randomly selected fish caught in Echo Lake, 115 were rainbow trout, 58 were other trout, 67 were bass, and 53 were catfish.
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