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[ad_1] 1.  Private nonprofit four-year colleges charge, on average, $26,367 per year in tuition and fees. The standard deviation is $7,114. Assume the distribution is normal. Let X be the cost for a randomly selected college. Round all answers to

[ad_1] 1. The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean 2744 and standard deviation 558. One randomly selected customer is observed to see how many calories X that customer consumes. Round all

[ad_1] 1.  A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 0.5% margin of error at a 99% confidence level, what size of sample is

[ad_1] 1.  On average, a banana will last 7 days from the time it is purchased in the store to the time it is too rotten to eat.  Is the mean time to spoil less if the banana is hung