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Question: Assume that, on average, 95% of all ticket holders show up for a flight. If a plane seats 200 people, how many tickets should be sold to make the chance of an overbooked flight as close as possible to 5%?
In the survey of 8000 women, 5431 say they change their nail polish once the week. Create the 99% confidence interval for population proportion of women who change their nail polish once a week.
provide a different example for each of the following types of variables from your work or home lifea a nominal level
At the significance level 0.01 is there sufficient evidence to conclude that a difference exists in the mean time required for the elimination of the rash?
An orange juice producer buys all their oranges from one particular orchard. The amount of juice from the oranges is approximately normally distributed with a mean of 152 ml. and a standard deviation of 41 ml.
there are 40 students in an elementary statistics class. on the basis of years of experience the instructor knows that
Give the mean and standard deviation of the sampling distribution of y‾.- Will the sampling distribution of y‾ be approximately normal? Explain.- Find P (y‾ > 5.5).
Likewise, the variance of the demand for the entire three week period is the sum of the individual weekly variances. But be careful! The standard deviation of the demand for the entire 3 week period is not the sum of the individual standard deviat..
The heights and shoe sizes of the starting lineup of a tournament baseball team are listed below. Use a calculator to determine the correlation coefficient.
For a regression equation, "cancellations" is my dependent variable and I want to know how many cancellations will be at 6pm since hour is my independent variable.
How many more sheep should be included in the sample if we want to say with 98% confidence that the population mean weight of the Jacob sheep is within 2.0 lb of the sample mean?
The number of ferromagnetic artifacts for each plot is determined. The variable in this information is number of ferromagnetic artifacts per 100 square meters.
to test the effect of sample size in a normal distribution with mu100 and sigma12 determine the probability of
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