Question

Note: Show your work/computation to get full credit There is a claim that the population mean is equal to 25. A sample of 16 items has a mean length of 25.8. The standard deviation of population is 1.8. The claim is to be tested at 2.5% level of significance. Answer the following questions. 1. (3 points) Write the hypothesis Null Hypothesis: Alternative hypothesis: 2. (1 point) Write the value of \( \alpha = \) 3. (3 points) Obtain the critical value (s) of z from normal table. z (critical) = 4. (3 points) Write the rule for testing. Rule: 5. (6 points) Compute the z (z-stat) value from sample data. z (stat) = 6. (2 points) Write the decision.

          Note: Show your work/computation to get full credit
There is a claim that the population mean is equal to 25. A sample of 16 items has a mean length of
25.8. The standard deviation of population is 1.8. The claim is to be tested at 2.5% level of significance.
Answer the following questions.
1. (3 points) Write the hypothesis
Null Hypothesis:
Alternative hypothesis:
2. (1 point) Write the value of \( \alpha = \)
3. (3 points) Obtain the critical value (s) of z from normal table.
z (critical) = 
4. (3 points) Write the rule for testing.
Rule:
5. (6 points) Compute the z (z-stat) value from sample data.
z (stat) = 
6. (2 points) Write the decision.

Note: Show your work/computation to get full credit
There is a claim that the population mean is equal to 25. A sample of 16 items has a mean length of
25.8. The standard deviation of population is 1.8. The claim is to be tested at 2.5% level of significance.
Answer the following questions.
1. (3 points) Write the hypothesis
Null Hypothesis:
Alternative hypothesis:
2. (1 point) Write the value of α =
3. (3 points) Obtain the critical value (s) of z from normal table.
z (critical) =
4. (3 points) Write the rule for testing.
Rule:
5. (6 points) Compute the z (z-stat) value from sample data.
z (stat) =
6. (2 points) Write the decision.

Added by Patricia B.

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