12.2 One sample has n = 15 with SS = 1570, and a second sample has n = 15 with SS = 1650. Find the pooled variance for the two samples. Compute the estimated standard error for the sample mean differences (i.e. for the two groups). If the sample mean difference (i.e. M1 – M2) is 8 points, is this enough to indicate a significant difference for a two-tailed test at a = .05 level? If the sample mean difference (i.e. M1 - M2) is 12 points, is this enough to indicate a significant difference for a two-tailed test at a = .05 level? a. b. с. d.

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7:37
12.2
One sample has n = 15 with SS = 1570, and a second sample has n = 15 with SS=
%3D
1650.
Find the pooled variance for the two samples.
Compute the estimated standard error for the sample mean differences
(i.e. for the two groups).
If the sample mean difference (i.e. M1 – M2) is 8 points, is this enough to
indicate a significant difference for a two-tailed test at a = .05 level?
If the sample mean difference (i.e. M1 - M2) is 12 points, is this enough
to indicate a significant difference for a two-tailed test at a = .05 level?
a.
b.
с.
d.
Transcribed Image Text:7:37 12.2 One sample has n = 15 with SS = 1570, and a second sample has n = 15 with SS= %3D 1650. Find the pooled variance for the two samples. Compute the estimated standard error for the sample mean differences (i.e. for the two groups). If the sample mean difference (i.e. M1 – M2) is 8 points, is this enough to indicate a significant difference for a two-tailed test at a = .05 level? If the sample mean difference (i.e. M1 - M2) is 12 points, is this enough to indicate a significant difference for a two-tailed test at a = .05 level? a. b. с. d.
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