Mathematics, 06.08.2019 19:30 nya4657
The mean weight of the students in a school is 70 kilograms. a random sample of 25 students was taken and the mean weight was found to be 55 kilograms with a standard deviation of 20 kilograms. what is the test statistics? express your answer into 2 decimal places (example: 25.00)
Answers: 2
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What is the factored form of the following expressions? d^2 – 13d + 36
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Determine the lengths of the sides of the rectangle using the given area. give answers both exactly and approximately (to the nearest tenth). the area of the rectangle is 46 cm2.
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Mathematics, 22.06.2019 03:40
Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?
Answers: 2
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