Mathematics, 19.07.2019 20:10 kiera2599
If the quality of teaching is similar in a school, the scores on a standardized test will have a standard deviation of 14. the superintendent wants to know if there is a disparity in teaching quality, and decides to investigate whether the standard deviation of test scores has changed. she samples 24 random students and finds a mean score of 156 with a standard deviation of 2.4354. is there evidence that the standard deviation of test scores has decreased at the α=0.01 level? assume the population is normally distributed.
Answers: 1
Mathematics, 21.06.2019 19:30
Choose the more precise measurement. 26.4 cm or 8.39 cm
Answers: 1
Mathematics, 21.06.2019 21:00
Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?
Answers: 3
Mathematics, 21.06.2019 23:00
Find the dimensions of the circle. area = 64π in.² r= in.
Answers: 1
If the quality of teaching is similar in a school, the scores on a standardized test will have a sta...
Mathematics, 28.02.2021 07:10
Mathematics, 28.02.2021 07:10
History, 28.02.2021 07:10
Arts, 28.02.2021 07:10
Mathematics, 28.02.2021 07:10
Business, 28.02.2021 07:10
Mathematics, 28.02.2021 07:10
English, 28.02.2021 07:10
Arts, 28.02.2021 07:10
Mathematics, 28.02.2021 07:10
Mathematics, 28.02.2021 07:10