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 18:30
The clayton familyās pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?
Answers: 1
Mathematics, 21.06.2019 21:00
George is putting trim around his rectangular deck, including the gate. he will need 44 feet of trim to do the entire deck. if the deck is 13 feet long, how wide is the deck?
Answers: 2
Mathematics, 21.06.2019 23:00
Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?
Answers: 1
Mathematics, 21.06.2019 23:30
Find measure angle 1 and measure angle 3 in the kite the diagram is not drawn on the scale
Answers: 1
Raw scores on behavioral tests are often transformed for easier comparison. A test of reading abilit...
History, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31
English, 14.11.2019 18:31
Social Studies, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31
Chemistry, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31
History, 14.11.2019 18:31
Mathematics, 14.11.2019 18:31