Question

In a test of hypothesis, the null hypothesis is that the population mean is equal to 80 and the alternative hypothesis is that the population mean is less than 80. The test is to be made at the 1% significance level. A sample of 100 elements selected from this population produced a mean of 74 and a standard deviation of 12. What is the value of the test statistics, z?

Name: in a test of hypothesis the null hypothesis is that the population mean is equal to 80 and the alternative hypothesis is that the population mean is less than 80 the test is to be made at th 73594
Uploaded: 2022-01-06T23:07:39-08:00
Duration: 34 s
Channel: Thuc Nguyen
Description: in a test of hypothesis the null hypothesis is that the population mean is equal to 80 and the alternative hypothesis is that the population mean is less than 80 the test is to be made at th 73594

          In a test of hypothesis, the null hypothesis is that the
population mean is equal to 80 and the alternative hypothesis is
that the population mean is less than 80. The test is to be made at
the 1% significance level. A sample of 100 elements selected from
this population produced a mean of 74 and a standard deviation of
12.
What is the value of the test statistics, z?

Added by Concepci-N C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Thuc Nguyen

01/06/2022

Step 1

- The null hypothesis (\(H_0\)) is that the population mean (\(\mu\)) is equal to 80: \(H_0: \mu = 80\). - The alternative hypothesis (\(H_a\)) is that the population mean is less than 80: \(H_a: \mu < 80\). - The significance level (\(\alpha\)) is 1% or 0.01. - Show more…

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In a test of hypothesis, the null hypothesis is that the population mean is equal to 80 and the alternative hypothesis is that the population mean is less than 80. The test is to be made at the 1% significance level. A sample of 100 elements selected from this population produced a mean of 74 and a standard deviation of 12. What is the value of the test statistics, z?