To assess the battery life of smartphones, product-testing groups use a stress test and record the...

To assess the battery life of smartphones, product-testing groups use a stress test and record the time until the phone dies. For example, they will set the phone to play a video on a continuous loop or continuously surf the Web until it is out of power. Suppose a product-testing group that uses a Web- surfing test reports your type of smartphone has a battery life of 684 minutes (11.4 hours). Because you use your phone intermittently and for more than just surfing, you expect your battery to have a longer life and decide to investigate this by starting each weekday on a full charge and seeing how long your phone lasts while doing your normal activities. The following data are the times in minutes for eight weekdays: 787, 721, 685, 727, 673, 751, 769, and 643. You then conduct a hypothesis test using a significance level of 0.05.

In symbols, what is the null and alternative hypotheses?
What is the value of the test statistic?
Use the classical method (provide the critical value) and make adecision (reject/donotreject).
This time, use the p-value method (provide the p-value) and make a decision (reject/donotreject).

5. In words, provide the conclusion of the test in the context of the question as though you were explaining it to someone who doesn’t know statistics.

Expert Solution

To assess the battery life of smartphones, product-testing groups use a stress test and record the time until the phone dies. For example, they will set the phone to play a video on a continuous loop or continuously surf the web until it is out of power. Suppose a product-testing group the uses .......

=> Solution :-

Given data -

orchestra answered 1 year ago

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