Mathematics, 28.06.2019 09:10 hahHcjckk
Scores this year for students taking the sat math test for the first time are believed to be normally distributed with mean . for students taking the test for the second time, this year's scores are also believed to be normally distributed, but with a possibly different mean . we wish to estimate the difference − . a random sample of the sat math scores of 100 students who took the test for the first time this year was obtained, and the mean of these 100 scores was ¯1=504.5 while the standard deviation was =100 . a random sample of the sat math scores of 30 students who took the test for the second time this year was also obtained, and the mean of these 30 scores was ¯2=539.1 while the standard deviation was =90 . using the conservative value for the degrees of freedom, a 95% confidence interval for − is: (−4.74,73.94) . (−3.10,72.30) . (1.92,67.28) .
Answers: 3
Mathematics, 21.06.2019 22:00, kingalex7575
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Answers: 1
Mathematics, 21.06.2019 22:30, madisonsan9020
Fast! find the length of cu. the triangles are similar. show your work.
Answers: 2
Mathematics, 22.06.2019 02:30, lauren21bunch
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Answers: 1
Scores this year for students taking the sat math test for the first time are believed to be normall...
Mathematics, 17.06.2020 04:57
Mathematics, 17.06.2020 04:57