Mathematics, 07.06.2021 16:10 graceaowen
Raw scores on behavioral tests are often transformed for easier comparison. A test of reading ability has mean 67 and standard deviation 10 when given to third graders. Sixth graders have mean score 86 and standard deviation 9 on the same test. To provide separate "norms" for each grade, we want scores in each grade to have mean 100 and standard deviation 20. (Round your answers to two decimal places.)
(a) What linear transformation will change third-grade scores x into new scores xnew = a + bx that have the desired mean and standard deviation? (Use b > 0 to preserve the order of the scores.) a = b = (b)
Do the same for the sixth-grade scores.
a =
b =
(c) David is a third-grade student who scores 79 on the test. Find David's transformed score.
Nancy is a sixth-grade student who scores 79. What is her transformed score?
Who scores higher within his or her grade? Nancy or David
Answers: 2
Mathematics, 21.06.2019 13:30
Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35
Answers: 2
Mathematics, 21.06.2019 17:40
Find the value of ax 4 ; a = 2, x = 1. select one: a. 2 b. 4 c. 1 d. 8
Answers: 2
Mathematics, 21.06.2019 20:00
The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?
Answers: 2
Raw scores on behavioral tests are often transformed for easier comparison. A test of reading abilit...
Mathematics, 01.10.2021 03:10
Biology, 01.10.2021 03:10
Mathematics, 01.10.2021 03:10
Computers and Technology, 01.10.2021 03:10
Mathematics, 01.10.2021 03:10
Business, 01.10.2021 03:10
Chemistry, 01.10.2021 03:10
History, 01.10.2021 03:10
Chemistry, 01.10.2021 03:10
Biology, 01.10.2021 03:10
Biology, 01.10.2021 03:10
Mathematics, 01.10.2021 03:10