Mathematics, 23.10.2019 20:00 caromaybelline71
In an article appearing in today’s health a writer states that the average number of calories in a serving of popcorn is 75. to determine if the average number of calories in a serving of popcorn is different from 75, a nutritionist selected a random sample of 20 servings of popcorn and computed the sample mean number of calories per serving to be 78 with a sample standard deviation of 7. compute the z or t value of the sample test statistic.
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be the population mean.
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