Mathematics, 28.11.2019 07:31 chjam265
Suppose a statistics instructor believes that there is no significant difference between the mean class scores of statistics day students on exam 2 and statistics night students on exam 2. she takes random samples from each of the populations. the mean and standard deviation for 35 statistics day students were 75.86 and 16.91.the mean and standard deviation for 37 statistics night students were 75.41 and 19.73. the day" subscript refers to the statistics day students. the "night subscript refers to the statistics night students. assume that the standard deviations are equal. a concluding statement is:
a. there is sufficient evidence to conclude that statistics night students' mean on exam 2 is better than the statistics day students' mean on exam 2.
b. there is insufficient evidence to conclude that the statistics day students' mean on exam 2 is better than the statistics night students' mean on exam 2.
c. there is insufficient evidence to conclude that there is a significant difference between the means of the statistics day students and night students on exam 2
d. there is sufficient evidence to conclude that there is a significant difference between the means of the statistics day students and night students on exam 2
Answers: 1
Another question on Mathematics
Mathematics, 21.06.2019 22:00
Harry and jay are both flying on the same plane with an airline that randomly assigns seats to passengers. of the 182 total seats on the plane, 62 are window seats, 58 are middle seats, and the rest are aisle seats. what is the approximate probability that both harry and jay will be assigned aisle seats on the same plane? a. 11.48% b. 3.3% c. 2.08% d. 26.26%
Answers: 3
Mathematics, 21.06.2019 22:00
Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?
Answers: 1
Mathematics, 22.06.2019 00:20
How is this equation completed? i cannot find any examples in the book.
Answers: 1
Mathematics, 22.06.2019 00:30
Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)
Answers: 2
You know the right answer?
Suppose a statistics instructor believes that there is no significant difference between the mean cl...
Questions
Mathematics, 07.07.2019 04:00
Mathematics, 07.07.2019 04:00
Mathematics, 07.07.2019 04:00
Mathematics, 07.07.2019 04:00
Mathematics, 07.07.2019 04:00
English, 07.07.2019 04:00
Biology, 07.07.2019 04:00
History, 07.07.2019 04:00
Social Studies, 07.07.2019 04:00
Mathematics, 07.07.2019 04:00
English, 07.07.2019 04:00
Physics, 07.07.2019 04:00
