Mathematics, 19.01.2021 02:40 joylsbarbour
Joshua teaches an SAT preparation class where each student takes a pre-test on the first day of class and a post-
test on the last day of class. Here are summary statistics for the scores of a recent group of students:
Test
Mean
Standard deviation
Pre-test
1000
175
Pre
Post-test
1150
190
Let D represent the the difference between a randomly chosen student's pre- and post-test scores.
Find the standard deviation of D.
Answers: 3
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 21:30, Travon6524
Ten members of balin's soccer team ran warm ups for practice. each member ran the same distance. their combined distance was 5/6 of a mile. to find the distance that each member ran, balin wrote the expression below.
Answers: 3
Mathematics, 22.06.2019 01:30, marianasanin2007
Two numbers have a sum of 93. if one number is p, express the other number in terms of p.
Answers: 1
Mathematics, 22.06.2019 03:00, jjgurl60
Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?
Answers: 2
You know the right answer?
Joshua teaches an SAT preparation class where each student takes a pre-test on the first day of clas...
Questions in other subjects:
Mathematics, 28.11.2019 00:31
Mathematics, 28.11.2019 00:31
Mathematics, 28.11.2019 00:31
Health, 28.11.2019 00:31
