Question: For each of the following write out null and the

For each of the following, write out null and the alternative hypotheses, being sure to indicate whether the alternative is one-sided or two-sided.
a) Consumer Repons discovered that 20% of a certain computer model had warranty problems over the first three months. From a random sample, the manufacturer wants to know if a new model has improved that rate.
b) The last time a philanthropic agency requested donations, 4.75% of people responded. From a recent pilot mailing, they wonder if that rate has increased.
c) A student wants to know if other students on her campus prefer Coke or Pepsi.



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  • CreatedMay 15, 2015
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