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The width of a 95% confidence interval for µ is 10 units.
If everything else stays the same, how wide would a 90% confidence interval be for µ?
IQ scores are normally distributed with a mean of 100 and a std dev of 15. If 25 people are randomly selected for an IQ test, find the probably that their mean score is between 95 and 105.
Please perform a hypothesis test using a .05 significance level on the following information. Next please perform a regression analysis as well as providing a scattered diagram.
If you must estimate the population mean within 2 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
to find the sample size needed for a hypothesis test if ho mu10 ha mult10 sigma is unknown alpha 0.01 beta 0.05 and e
a. How many of those in the sample would you expect to name chocolate? (Round your answer to the nearest whole number.) b. What is the probability exactly five of those in the sample name chocolate? (Round your answer to 4 decimal places.) c. What is..
the data in this question come from from sen and srivastava exercise 2.12 2 and can be used to model car ownership
what is the probability that the sample mean will be greater than 10,t hat the sample mean will be greater than 12, the sample mean will be between 8 and 12, and the probability that the sample mean will be less than 7?
Develop a simple regression model that relates electricity usage to home size. What is the resulting regression equation?
according to the mendelian theory of inherited characteristics a cross fertilization of related species of
Use the correct formula to find the probability that, out of 10 customers, exactly 5 are familiar with the product. Show your calculations or explain how you found the probability.
What is the probability that an individual shopper spends between $17.25 and $21.60 on impulse buys?
What is probability that all specimen of one of the two types of rock are selected for analysis?
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