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A sample of n = 16 observations is drawn from a population that is normally distributed with mean 1,000 and standard deviation 200. What is P(mean ≥1100)?
Find a 95% confidence interval for the mean amount of interest it could gain if each of its customers paid exactly one day more promptly.
What is the maximum number of customers waiting in the room for the probability of 95%? What percentage of customers who must wait for a counter server to become available?
fifty percent of the people that get mail-order catalogs order something. find the probability that only four of the 10
Calulate the critical value of ra. (f) Can you reject p = 0? 12.4 Moviegoer Spending ($) on Snacks Age (X) 30,50,34,12,37,33,36,26,18,46. Spent (Y) 2.85,6.50,1.50,6.35,6.20,6.75,3.60,6.10,8.35,4.35.'
Test at the 5% level of significance for the equality of the mean computational times of the four software packages.- Find a 95% confidence interval for the mean computational time using software package C.
What is the variance of the number of days absent - Compute the variance and standard deviation of a probability distribution and What is the probability of passing at least one?
The average efficiency of the sample is calculated to be 91.0% and the standard deviation of the sample is 0.8%. If we want to cut the confidence interval by one-half, how many more motors should be tested?
the u.s. census bureau collects and analyzes data on numerous aspects of american life by state including the
A research analyst believes that average back-to-school spending is more than a trade group's prediction of $500. Specify the null and alternative hypothesis.
Explain why a process can be out of control even though all the samples fall within the upper and lower control limits - What is the overall average
What is the 99% confidence interval for a sample of 52 seat belts that have a mean length of 85.6 inches long and a standard deviation of 3.8 inches?
Identify a scientific or real-world problem with a relevant data set
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