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RES 342 CH10 10.23 solved

# RES 342 CH10 10.23 solved - 10.21(a At =.05 does the...

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10.21  (a) At α = .05, does the following sample show that daughters are taller than their mothers? (b) Is the decision close? (c) Why might daughters tend to be taller than their mothers? Why might they not? Family Daughter’s  Height (cm) Mother’s  Height (cm) 1 167 172 2 166 162 3 176 157 4 171 159 5 165 157 6 181 177 7 173 174 10.23 Blockbuster is testing a new policy of waiving all late fees on DVD rentals using a sample of 10 randomly chosen customers. (a) At α = .10, does the data show that the mean number of monthly rentals has increased? (b) Is the decision close? (c) Are you convinced? Customer No Late Fee Late Fee 1 14 10 2 12 7 3 14 10 4 13 13 5 10

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