31. A publishing company claims that the average length of its books is more than 1000 pages. In a study, 20 books are randomly selected. The average length within the sample is 1085 pages, and the standard deviation with the sample is 120 pages. Assume that the book lengths in pages are approximately normally distributed. Use a significance level of 0.05 to test the publishing company's claim. a) Ho: Ha:

Q: 1/x

A:

Q: in a certain region, the mean annual salary for electricians is $58,650. Let x be a random variable…

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A: Here we have to find the integral value.

Q: 14 m2a2

A: Total female = 133+43 = 178 Total "did not graduate" = 55+43 = 98 Grand total= (126+55+133+43)  =…

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Q: 41 21°

A: As we know that  sin(θ)=opposite hypotanuse

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Q: 4. X = 100

A:

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Q: y² 49 1 y? /-

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Q: A. 175

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Q: 5.2 please

A: Given information 95% confidence interval = (128 minutes, 147 minutes)

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Q: with

A:

Q: -2 2. d=r Sinp.sin0

A: