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What makes the standard normal distribution different from other distributions?
An estimated population variance of 200. a.) What is the standard deviation of the distribution of differences between means? b.) What is the mean? c.) What will be its shape?
The mean pulse rate for males. Define the null and alternative hypothesis. SD= 18.48 pulse rate for males 25.07 women.
Collapse the response categories in the following tables so that it meets the assumptions of the chi-square test; than perform the test.
scores on an endurance test for cardiac patients are normally distributed with mean 200 and standard deviation 30.a
a restaurant claims that the standard deviation in the lenght of serving times is less than 2.9 minutes. a random
The manager of a department store wants to determine what proportion of people who enter the store use the store's credit cards for their purchases.
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
a simple random sample of 120 sat scores has a mean of 1540. assume that sat scores have a population standard
Suppose that 40% of participants consume caffeine and smoke. if 8 participants are evaluated, what is the probability that: a) Exactly half of them consume caffeine and smoke?
The following problem develop the concept of determining the probability distribution of random variable and its mean and variance.
During a recent year the average cost of making a movie was $54.8 million. This year, a random sample of 15 recent action movies had an average production cost of $62.3 million with a variance of $ 8 million.
a recent political poll for a local election indicated that 70 of the 250 voters sampled preferred candidate a.
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