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 22:00, blythephillips2734
Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?
Answers: 2
Mathematics, 21.06.2019 22:10, goodygoodgirlygirl
Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft
Answers: 1
If the quality of teaching is similar in a school, the scores on a standardized test will have a sta...
Mathematics, 17.07.2019 16:30
Spanish, 17.07.2019 16:30
English, 17.07.2019 16:30
Social Studies, 17.07.2019 16:30