Sample mean and sample standard deviation
You are given the sample mean and the sample standard deviation. use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider?
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Nancy Bright's SAT score was 1390. What percentage of students have scores more than Nancy Bright? What percentage of students score between 1100 and 1200?
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For the period from 1918 to the present, in a random sample of 9 wolves spotted in the region, what is the probability that 6 or more were male.
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