Problem # 1: proper statistical testing to conclude if Is there is a difference among population proportions. 5% level of significance (? = .05).
# 1 #2 #3
17 18 20
18 21 26
25 28 33
29 36 28
Problem # 2: Use ANOVA method to determine if there is a statistical differences among population means. Show all the work. (? = .01).
Group 1 Group 2 Group 3
28 26 55
35 34 62
42 27 44
23 32 54
50 41 60
Problem # 3: For the following Dependent and independent variables, complete simple regression analysis to find the following. Explain them in detail. (? = .05).
Quantity (X) Cost (Y)
12 55
11 48
13 66
14 72
17 80
a) Predict cost where quantity = 25
b) Determine standard error of estimate?
c) Interpret slope and intercept
d) Find R^2 and R, interpret their values.
e) Is there any correlation between Quantity and Cost
f) Set up a 95% Confidence Interval Estimate for the predicted Cost (Y^)
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