a) Find the pooled variance for the two samples. (Use/round to 2 decimal places.) Pooled variance = (b)Compute the estimated standard error for the sample mean difference. (Use/round to 3 decimal places.) Estimated standard error = (c) If the sample mean difference is 6 points, is this enough to reject the null hypothesis and conclude that there is a significant difference for a two-tailed test at the 0.10 level? (Use/round to 3 decimal places.) What is the t-critical? = ± what is the t? = (d) What is the decision regarding the null? Accept the null or reject it? Write "accept" or "reject" in the blank.
One sample has n = 17 with SS = 1646, and a second sample has n = 17 with SS = 1710.
(a) Find the pooled variance for the two samples.
(Use/round to 2 decimal places.) Pooled variance =
(b)Compute the estimated standard error for the sample mean difference.
(Use/round to 3 decimal places.) Estimated standard error =
(c) If the sample mean difference is 6 points, is this enough to reject the null hypothesis and conclude that there is a significant difference for a two-tailed test at the 0.10 level?
(Use/round to 3 decimal places.)
What is the t-critical? = ±
what is the t? =
(d) What is the decision regarding the null? Accept the null or reject it? Write "accept" or "reject" in the blank.
(e) Calculate the percentage of variance accounted for (r2) to measure the effect size for an 6-point mean difference.
(Use/round to 3 decimal places).
What is the r2? =
(f) What size is the effect? Write "small", "medium", or "large" in the blank
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