Quiz 8 0/5 answered Homework Due in 15 hours 11:59 AM For a research study measuring the effect of two treatments, the sample sizes are n = 8 in one treatment and n = 10 in the other treatment, and the pooled variance is 1.23. The sample means are M = 21.2 and M = 24.1. Using a two-tailed t test, determine the t value for = 0.05 and make a decision about the null hypothesis. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a t=-5.18, therefore we reject the null hypothesis. b t = -5.18, therefore we fail to reject the null hypothesis. C t = -5.47, therefore we reject the null hypothesis. d t = -5.47, therefore we fail to reject the null hypothesis. Independent Samples Question 2 Homework Unanswered Due Mar 28th, 11:59 AM One sample from an independent-measures study has n = 18 with a variance of s = 1565. The other sample has n = 23 and s = 1470. What is the df value for the t statistic? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. 10 a 38 b 39 C 40 40 d 41 EOC 11.41 Homework Unanswered Due Mar 28th, 11:59 AM As the sample size increases, the standard error of the mean becomes Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Q larger smaller C no different from any other sample