Please help me with this exercise. Thank you
Homework Answers
Hypothesis:
H0 : mud = 0
Ha : mud not equals to 0
test statistics:
BrandA Brand B dbar
36925 34318 2607
45300 42280 3020
36240 35500 740
32100 31950 150
37210 38015 -805
48360 47800 560
38200 37810 390
33500 33215 285
dbar = ?(before) - ?(after) = 868.3750
s(dbar) = 1290.0331
SE = s(dbar)/sqrt(n)
= 1290.0331/sqrt(8)
= 456.0956
Test Statisitcs,
t = dbar/SE
= 868.3750/456.0956
= 1.9039
p value = .0986
do not reject the null hypothesis
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