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30 August, 12:14

In an experiment to study the regulation of insulin secretion, blood samples were obtained from seven dogs before and after electrical stimulation of the vagus nerve. The following values show, for each animal, the increase (after minus before) in the immunoreactive insulin concentration (µU/ml) in pancreatic venous plasma.

30 100 60 30 130 1,060 30

For these data, Student's t method yields the following 95% confidence interval for the population mean:

-145< m <556

Is Student's t method appropriate in this case? Why or why not?

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  1. 30 August, 15:37
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    Step-by-step explanation:

    The t distribution is used to compute statistical values when it is inappropriate to use the normal distribution. In this scenario, the statistical value calculated for is the test score. The t distribution is used when population standard deviation is unknown. It is also used when the sample size is small (lesser than 30).

    In this scenario, the sample size is 7 which is small. Also, the population standard deviation is unknown. Only the sample standard deviation can be calculated. Therefore, the Student's t method is appropriate
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