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Research scientists reports that mice will live the average of 42 months when their diets are sharply restricted and enhanced with vitamins and proteins. Suppose that lifetimes of such mice are normally distributed with standard deviation of 6 months, determine the probability that given mouse will live
(a) more than 32 months(b) less than 37 monhts(c) between 40 and 48 months
What would be the correct null and alternative hypothesis for the following situation: The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greate..
Consider a Poisson distribution with a mean of two occurrences per time period.
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
The managers in a company's East and West regions were rated on the basis of the company's evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions.
What control chart(s) would you use for this data and what are the final control limits?
Suppose we have randomly and independently sampled 25 women and asked each whether she has been a victim of domestic abuse at some point in her life. Find the probability that more than 22 of the women sampled have not been the victim of domestic ..
Test the whether the attitude toward keeping weight down associated with smoking status.
An airline estimates that 98% of people booked on their flights actually show up. If the airline books 76 people on a flight for which the maximum number is 74
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
Please explain the term analysis variance so a person without formal statistics education can understand.
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