Question

PUBH 6033—Week 5 Assignment:

Steps to Hypotheses Testing

Instructions

For this Assignment, review this week’s Learning Resources, including the 5 step approach to hypothesis testing document. Read the research scenario, below, and then answer the questions related to the steps that must be followed to make the appropriate decision as to reject or fail to reject the null hypothesis.

Submit this Application Assignment by Day 7.

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Research Scenario

Hemoglobin levels (g/dL) from the general population of adult men form a normal distribution with m = 15.3 and s = 0.95. Several studies have shown that vegans and vegetarians suffer from lower than normal hemoglobin levels, which indicates anemia. Using clinical data, a researcher measured hemoglobin levels from a sample of n = 64 adult men who followed a vegan or vegetarian diet. The average hemoglobin level (g/dL) for this sample was x? = 14.2. Do these data indicate that following a vegan or vegetarian diet has a significant effect on hemoglobin levels? Test with p=.05.

Note

µ = population mean

x? = sample mean

= standard deviation

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Note: Each response is worth 6 points

Step 1: Set up your hypothesis and determine the level of significance

            State the null hypothesis

In written format

Answer:

In mathematical format

Answer:

State the alternative hypothesis

In written format

Answer:

In mathematical format

Answer:

Determine the Level of significance

Based on information in the scenario, what is the level of significance to be used?

Answer:

Step 2: Select the appropriate test statistic

The appropriate test statistic for the above scenario is the one-sample z test. What is a Z test? Describe why this is the appropriate test for the scenario?

Answer:

Step 3: Set up the decision rule

Based on the level of significance you set in Step 1 (Question 5) and whether your alternative hypothesis is directional or non-directional, what is your decision rule? (In other words, what is your rejection region?)

Answer:

Step 4: Compute the test statistic

Calculate the z statistic. Please show your work.

Answer:

Step 5: Conclusion

9.           Do you reject or fail to reject the null hypothesis?

Answer:

10.       Are hemoglobin levels affected by a vegan or vegetarian diet?

Answer:

Answer 1