Question

Some college professors make bound lecture notes available to their classes in an effort to improve teaching effectiveness. In a study, two groups of students were surveyed –86 students enrolled in a promotional strategy class that required the purchase of lecture notes and 35 students enrolled in a sales/retailing elective that did not offer lecture notes. At the end of the semester, students were asked to respond to the statement, “Having a copy of the lecture notes was (would be) helpful in understanding the material.” Responses were measured on a 9-point semantic difference scale, where 1=strongly disagree and 9=strongly agree. n1=86 x?1= 8.35 S1= 0.94 n2=35 x?2= 7.8 S2= 2.99 Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students? Find the value of the test statistic 2.19 1.77 1.64 2.01 Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students if we test at ? = 0.01? What about ? = 0.1? We can reject H? at ? = 0.1 and at ? = 0.01 We can reject H? at ? = 0.1 but not at ? = 0.01 We can reject H? at ? = 0.01 but not at ? = 0.1 We can not reject H? neither at ? = 0.1 nor at ? = 0.01

          Some college professors make bound lecture notes available to their classes in an effort to improve teaching effectiveness. In a study, two groups of students were surveyed –86 students enrolled in a promotional strategy class that required the purchase of lecture notes and 35 students enrolled in a sales/retailing elective that did not offer lecture notes. At the end of the semester, students were asked to respond to the statement, “Having a copy of the lecture notes was (would be) helpful in understanding the material.” Responses were measured on a 9-point semantic difference scale, where 1=strongly disagree and 9=strongly agree.

n1=86 x?1= 8.35 S1= 0.94
n2=35 x?2= 7.8 S2= 2.99

Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students?
Find the value of the test statistic
2.19
1.77
1.64
2.01

Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students if we test at ? = 0.01? What about ? = 0.1?
We can reject H? at ? = 0.1 and at ? = 0.01
We can reject H? at ? = 0.1 but not at ? = 0.01
We can reject H? at ? = 0.01 but not at ? = 0.1
We can not reject H? neither at ? = 0.1 nor at ? = 0.01

Some college professors make bound lecture notes available to their classes in an effort to improve teaching effectiveness. In a study, two groups of students were surveyed –86 students enrolled in a promotional strategy class that required the purchase of lecture notes and 35 students enrolled in a sales/retailing elective that did not offer lecture notes. At the end of the semester, students were asked to respond to the statement, “Having a copy of the lecture notes was (would be) helpful in understanding the material.” Responses were measured on a 9-point semantic difference scale, where 1=strongly disagree and 9=strongly agree.

n1=86 x?1= 8.35 S1= 0.94
n2=35 x?2= 7.8 S2= 2.99

Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students?
Find the value of the test statistic
2.19
1.77
1.64
2.01

Do the samples provide sufficient evidence to conclude that there is a difference in the mean responses of the two groups of students if we test at ? = 0.01? What about ? = 0.1?
We can reject H? at ? = 0.1 and at ? = 0.01
We can reject H? at ? = 0.1 but not at ? = 0.01
We can reject H? at ? = 0.01 but not at ? = 0.1
We can not reject H? neither at ? = 0.1 nor at ? = 0.01

Added by Jeremy S.

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