A university surveyed recent graduates of the English department for their starting salaries. One hundred and ninety six graduates returned the survey. The average salary was $25,200. The population standard deviation was $1,250. What is the 95% confidence interval for the mean salary of all graduates from the English department?

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A: We have given that  Three treatment  and each treatment having six size .

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A: Solution: From the given information, n=32, d-bar=1.358, α=0.05 and sd=0.635.

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A: One sample Z test:

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A: Solution To find p value we will use chi square distribution.

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: About 300 secretaries work in a government agency. Their average keyboard usage rate is 65 words per…

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Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

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Q: Give a 95% confidence interval for the number of arrivals. (34.9,69.8) Suppose the computed 95%…

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Q: grocery store has taken a random sample of 100 customers The average length of time it took the…

A: Mean = 4.2Standard deviation = 0.6Sample size = 100

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Q: Construct a 95% confidence interval for the mean number of books people read. (_,_)

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Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A:

Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

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Q: Suppose that the average number of Facebook friends users have is normally distributed with a mean…

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