2/13/2023 0 Comments Graphing calculator ti 84 online![]() Here, you are testing the firm’s belief that the mean time spent is more than 7 days. The alternative hypothesis is a statement about what you are testing. At a significance level of 0.05, does this survey provide evidence to support the firm’s belief? Step 1: Write the null and alternative hypotheses ![]() They conduct a survey of 32 people who had recently purchased a TV and found that the mean time spent researching the purchase was 7.8 days with a standard deviation of 3.9 days. Suppose that a marketing firm believes that people who are planning to purchase a new TV spend more than 7 days researching their purchase. Example: performing a t-test on the calculator For this example, assume that the requirements for a hypothesis test for the mean are met (randomly selected sample, independent observations, large population size). ![]() ![]() We will use an example to see how this process works. ![]()
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