2. Group 1 Group 2 Group 3 Group 4
Mean 81.98 112.28 112.08 73.63
SD 8.51 7.50 7.11 5.17
n 21.00 21.00 21.00 21.00
(SD) = standard deviation (n) = sample size
The above data is for 4 independent groups. You construct a 90% confidence interval on the quantity: k = mu(sub)1 - mu(sub)2 - mu(sub)3 + mu(sub)4
What are the endpoints of the interval?
3. Using the above data from the previous question, compute the t- statistic for testing the null hypothesis: H(sub)0 : mu(sub)1 - mu(sub)2 - mu(sub)3 + mu(sub)4 = 0
(H(sub)0 = null hypothesis)
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