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The College Board American College Testing Program reported a population mean Sat score of (funny looking) u-1020. Assume that the population standard deviation is funny looking o with line top right = 100,
a) What is the probability that a random sample of 75 students will provide a sample mean score within 20 of the population mean?
b) What is the probability a random sample of 75 students will provide a sample mean Sat score within 20 of the population mean?
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As part of a safety check, the Keystone Cops randomly stopped 65 ambulances and checked their tire pressure. The sample mean was 32 lbs/sq. in. with a sample standard deviation of 2 lbs/sq. in. Find the 98% confidence interval for the population m..
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If the limits of the confidence interval of the difference between the means of two normally distributed populations were 3.5 and 5.5 at the 95% confidence level, then we can conclude that we are 95% certain that there is a significant difference ..
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