9. If the weights of girls at age 8 is normally distributed with mean µ = 56 pounds, and standard deviation o = 5.1, fin

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9 If The Weights Of Girls At Age 8 Is Normally Distributed With Mean U 56 Pounds And Standard Deviation O 5 1 Fin 1 (73.75 KiB) Viewed 16 times

9. If the weights of girls at age 8 is normally distributed with mean µ = 56 pounds, and standard deviation o = 5.1, find: (a) The weight corresponding to the 75% percentile (that is: what weight is greater than 75% of all weights)? (b) The weight corresponding to the 40% percentile. (c) The range consisting of the middle 95% of all weights. 10. A bag contains 8 marbles. (a) How many ways could we select 5, without replacement, if the order matters. (b) How many ways could we select 5, without replacement, if the order doesn't matter. (c) How many ways could we select 5, with replacement, if the order matters. (d) How many ways could we select 5, with replacement, if the order doesn't matter. 11. Suppose that in the population, on a certain measurement, the mean is μ = 56.2 and the standard deviation is o = 8.1. Would it be considered unusual if a random sample of n = 81 had a sample mean of o = 60.3?