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A statistics professor plans classes so carefully that the lenghts of her classes are uniformly distributed between 50.0 and 52.0 minutes. find the probability that a given class period runs less than 50.75 minutes.
Michelle is a counselor at the local crises center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
A box contains 10 chips. The chips are numbered 1 through 10. Otherwise, the chips are identical. From this box, we draw one chip at random, and record its value.
Assume that in a hypothesis test with null hypothesis H 0 : μ = 14.0 at a = 0.05, that a value of 13.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of:
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
Heights of college-aged women are approximately bell-shaped and symmetric, with almost all of them (95%) falling between 58" and 72". Find the approximate values of the mean and standard deviation.
A game company that manufactures a dart game that dispenses tickets has been asked to put a business plan together for a customer who wishes to buy the game.
Suppose you were to cut up the directory and pull out one listing at random to contact.
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
The bin with replacement, find the probability that all the bulbs selected are good ones. Round to the nearest thousandth if necessary.
What are the limitations and assumptionbs of the t-test? What are some examples in your field (Nursing) for which you might use a t-test to compare a sample to the population and why?
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet.
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week. A 99% confidence interval for the population is??
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