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We are working out how much factory workers spend on lunch. n=36sigma =$11.5mu= $95
A) Estimate with 95% confidence the actual mean spending on lunch meals per week for all of the factory workers.
B) Obtain the lower confidence limit and the upper confidence limit of the 95% confidence interval estimate of the mean spending on lunch meals per week for all of the factory workers.
Suppose X is a discrete random variable with mean mX and variance s2X. Let Y be a linear function of X, such that Y = aX + b, where a and b are constants. Find the mean and variance of Y in terms of mX and s2X.
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Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = 0.05, is number of sticks of gum person chews per day actually greater than 8?
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A Poisson distribution was fitted to data for the number of cars crossing a bridge in forty successive 6-minute intervals of time. The sample mean was calculated from the data to be ??¯ = 2.875 and this value was used as an estimate of the populat..
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