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A population has a mean is 25 and a standard deviation of five. The sample mean is 24, and the sample size is 108. What distribution should you use to perform a hypothesis test?

Short Answer

Expert verified

When the standard deviation is known and the population size is large, the Normal distribution approach is appropriate for performing the hypothesis test.

Step by step solution

01

Given Information

The population has a mean of 25and a standard deviation of 5. According to the data, the population has a mean of 25and a standard deviation of 5. The sample size is 108people, and the sample mean is 24. Now, for a hypothesis test.

02

Explanation

Typically, a hypothesis test is conducted on a sample of data drawn from a broader population. This test is used to generate results from sample data based on a hypothesis. Because we have the standard mean, standard deviation, sample mean, and population size, the hypothesis test may be performed using the normal distribution approach. The normal distribution is a continuous probability distribution with a bell shape in which all values cluster around the mean.

03

Calculation

We must use the following formula to calculate using the normal distribution:

The sample mean is X, the population mean is μ, the standard deviation is σ, and the sample size is η.

Z=X¯σ-μ/η

24-255/108

=-15/10.3923=-2.078

As a result, the normal distribution approach is suitable for larger populations with established standard deviation values.

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