The weights of students at a university have mean 180 with standard deviation 22 pounds. If 30 students are selected at random, what is the probability that the mean weight of the students is less than 170 pounds? (round your answer to the nearest thousandth)

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A: Use excel formula "=NORMDIST(72, 68.5, 2.4/SQRT(100), TRUE)" to find the probability. Answer:

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A: Let X denote the Normal distribution. It is given that mean = 52 and SD = 72, then Z = (X - mean)/SD…

Q: The mean of a normal probability distribution is 600; the standard deviation is 20. About 68% of…

A: given data normal distribution population mean  = 600 population sd = 20

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A: consider the test statistics z=x-μσn where μ is the mean, σ is the standard deviation, n is the…

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A: Where,

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A: μ = 20.7 σ = 6.5 N = 50 P ( 19.4 < x̅  < ( 22.5 ) = ?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.