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The average age of online consumers few years ag0 was 23.5 years As older individuals gain confidence with the Internet, it is believed that the average age has in...

Question

The average age of online consumers few years ag0 was 23.5 years As older individuals gain confidence with the Internet, it is believed that the average age has increased_ We would like to test this belief: Answer parts a) through e) below:

The average age of online consumers few years ag0 was 23.5 years As older individuals gain confidence with the Internet, it is believed that the average age has increased_ We would like to test this belief: Answer parts a) through e) below:



Answers

According to the Statistical Abstract of the United States, in $2000,10.7 \%$ of Americans over 65 years of age used the Internet. A researcher believes the proportion of Americans over 65 years of age who use the Internet is higher than $10.7 \%$ today. (a) Determine the null and alternative hypotheses.
(b) Suppose sample data indicate that the null hypothesis should be rejected. State the conclusion of the researcher. (c) Suppose, in fact, the percentage of Americans over 65 years of age who use the Internet is still $10.7 \% .$ Was a Type I or Type II error committed?


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