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T Tests-
1. Calculate a t-test for the following:
Pre-test scores
Post-test scores
10
50
60
20
70
30
80
40
90
100
2. You are interested in investigating the change in students' communication competency scores from your pretest to your posttest. Write the hypothesized relationship:
a. Null Hypothesis:
b. Alternative Hypothesis:
3. Was this a one tail or two tail significance tests? Explain.
4. To what extent are the pre and post test means scores statistically significant?
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant.
in a test of the hypothesis h0 u -60 versus h u 60 a sample of n 50 observations possessed mean x 60.6 and standard
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annual pay an employment information service claims the mean annual pay for the full-time male workers over age 25 and
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Hi, the problem is this. Pls choose only one to answer thanks Let X1, X2,..., Xn, be independent Bernoulli random variables with P[Xi = 0] = 1- p, p = 1, 2,...,n. Prove that is sufficient for p. Let X1 & X2 be Poisson random variables with. Prove th..
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