Hypothesis Testing for The Difference Between Two Population Parameters Discussion

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Mathematics

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Use the link in the Jupyter Notebook activity to access your Python script. Once you have made your calculations, complete this discussion. The script will output answers to the questions given below. You must attach your Python script output as an HTML file and respond to the questions below.

In this discussion, you will apply the statistical concepts and techniques covered in this week's reading about hypothesis testing for the difference between two population proportions. In the previous week’s discussion, you studied a manufacturing process at a factory that produces ball bearings for automotive manufacturers. The factory wanted to estimate the average diameter of a particular type of ball bearing to ensure that it was being manufactured to the factory’s specifications.

Recently, the factory began a new production line that is more efficient than the existing production line. However, the factory still needs ball bearings to meet the same specifications. To compare the accuracy of the new process against the existing process, the factory decides to take two random samples of ball bearings. The first sample is of 50 randomly selected ball bearings from the existing production line, and the second sample is of 50 randomly selected ball bearings produced from the new production line. For each sample, the diameters of the ball bearings were measured.

The two samples will be generated using Python’s numpy module. These data sets will be unique to you, and therefore your answers will be unique as well. Run Step 1 in the Python script to generate your unique sample data.

Suppose that the factory claims that the proportion of ball bearings with diameter values less than 2.20 cm in the existing manufacturing process is the same as the proportion in the new process. At alpha=0.05, is there enough evidence that the two proportions are the same? Perform a hypothesis test for the difference between two population proportions to test this claim.

In your initial post, address the following items:

  1. Define the null and alternative hypotheses in mathematical terms as well as in words.
  2. Identify the level of significance.
  3. Include the test statistic and the P-value. See Step 2 in the Python script. (Note that Python methods return two tailed P-values. You must report the correct P-value based on the alternative hypothesis.)
  4. Provide a conclusion and interpretation of the test: Should the null hypothesis be rejected? Why or why not?

In your follow-up posts to other students, review your peers' analyses and address the following questions:

  1. How does your conclusion compare to theirs?
  2. Do they have the correct conclusion based on their P-value and the level of significance? Why or why not?

Remember to attach your Python output and respond to all questions in your initial and follow up posts. Be sure to clearly communicate your ideas using appropriate terminology. Finally, be sure to review the Discussion Rubric to understand how you will be graded on this assignment.

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Rubric Criteria Exemplary Proficient Needs Improvement Not Evident Value 40 Comprehension Develops an initial post with Develops an initial post an organized, clear point of with a point of view or view or idea using rich and idea using adequate significant detail (100%) organization and detail (85%) Develops an initial post with a point of view or idea but with some gaps in organization and detail (55%) Does not develop an initial post with an organized point of view or idea (0%) Timeliness N/A 10 Submits initial post on time (100%) Submits initial post one day late (55%) Submits initial post two or more days late (0%) Engagement 30 Provides relevant and meaningful response posts with clarifying explanation and detail (100%) Provides relevant response posts with some explanation and detail (85%) Provides somewhat relevant response posts with some explanation and detail (55%) Provides response posts that are generic with little explanation or detail (0%) 20 Writing (Mechanics) Writes posts that are easily understood, clear, and concise using proper citation methods where applicable with no errors in citations (100%) Writes posts that are Writes posts that are easily understood using understandable using proper citation methods proper citation methods where applicable with where applicable with a few errors in citations number of errors in (85%) citations (55%) Writes posts that others are not able to understand and does not use proper citation methods where applicable (0%) Total 100%
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Reply 1
Your conclusion on whether to reject or accept the null hypothesis is similar to mine. There is no
significance difference in ball bearings’ diameter tha...


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