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The number of customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 10,000?
Calculate the population mean and population standard deviation.
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
What is the relationship between the variance and the standard deviation?
Compute fraction of the employees cost between $1,500 and $2,000 per year? Evaluate percent that didn't have any dental expense.
The analysis of covariance (ANCOVA) is generally useful for _______________
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations.
The demand, D, on any given day is uniformly distributed over [80,140]. How many units should the retailer order to maximize expected profit?
The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100. a) What is the probability that a randomly selected applicant scores between 425 and 575?
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
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