Mathematics, 28.06.2019 18:00, lifewseth
Times spent studying by students in the week before final exams follow a normal distribution with standard deviation 8 hours. a random sample of 4 students was taken in order to estimate the mean study time for the population of all students a. find the standard error of the mean b. what is the probability that the sample mean exceeds the population mean by more than 2 hours? c. what is the probability that the sample mean is more than 3 hours below the population mean? d. what is the probability that the sample mean differs from the population mean (on either side) by more than 4 hours? e. suppose that a second (independent) random sample of ten students was taken. without doing the calculations, state whether the probabilities in b, c, and d would be higher, lower, or the same for the second sample.
Answers: 1
Mathematics, 21.06.2019 18:00, ineedhelp2285
Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need
Answers: 2
Mathematics, 21.06.2019 19:00, faizaanahmed4p7gn2z
The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'
Answers: 1
Mathematics, 21.06.2019 19:00, ltawiah8393
Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?
Answers: 1
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