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 16:50
Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?
Answers: 1
Mathematics, 21.06.2019 17:00
The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?
Answers: 1
Mathematics, 21.06.2019 18:40
Ten times the square of a non-zero number is eqaul to ninety times the number
Answers: 1
Times spent studying by students in the week before final exams follow a normal distribution with st...
English, 22.07.2019 00:10
Mathematics, 22.07.2019 00:10
Health, 22.07.2019 00:10
Health, 22.07.2019 00:10
Mathematics, 22.07.2019 00:10
English, 22.07.2019 00:10
Mathematics, 22.07.2019 00:10
Mathematics, 22.07.2019 00:10
Business, 22.07.2019 00:10
English, 22.07.2019 00:10
Social Studies, 22.07.2019 00:10
Mathematics, 22.07.2019 00:10