Question

suppose you are using a=.01 to test the claim than mu is greater than or equal to 32 using a p-value. you are given the sample statistics n=40 , x bar =33.8 and o =4.3. Find the p-value.

0.0040, 0.0211, 0.1030, 0.9960

Answer 1

Using the z-distribution, the p-value for the test is of 0.0040.

What is the test statistic for the z-distribution?

The test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which:

• $\overline{x}$ is the sample mean.

• $\mu$ is the value tested.

• $\sigma$ is the standard deviation of the population.

• n is the sample size.

For this problem, the parameters are given as follows:

$\overline{x} = 33.8, \mu = 32, \sigma = 4.3, n = 40$

Hence the value of the test statistic is given by:

$z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}$

z = (33.8 - 32)/(4.3/sqrt(40))

z = 2.65.

What is the p-value?

Using a z-distribution calculator, with z = 2.65 and a right-tailed test, as we are testing if the mean is greater than a value, the p-value is of 0.0040.

More can be learned about the z-distribution at https://brainly.com/question/16313918

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