**Assignment Details**

You are a Business Analyst working for the ABC Ball Bearing company. An hour ago, you sent an order of 74 boxes of your A1 ball bearings to a customer on your delivery truck. You have just found out that your truck is going to go over a bridge that has a weight limit of 11,500 lbs. You need to determine if your truck will safely make it over the bridge. If you determine that the truck cannot make it over the bridge, you will need to call the driver and have him/her turn back.

The plant manager has told you that an empty delivery truck with the driver weights about 8500 lbs.

You have 30 boxes of the A1 ball bearings in your plant. You immediately had them weighed. The weights of the boxes are:

40.1 41.1 39.5 40.1 39.1

41.2 37.6 39.1 41.6 40.8

43.2 38.9 38.1 43.5 36.9

39.1 40.5 41.2 37.6 44.0

38.0 39.8 42.1 38.6 41.3

43.7 36.9 43.6 38.1 40.2

- Calculate the Mean and the Standard Deviation of this sample.
- Using the normal distribution curve, calculate the probability the truck’s total weight is under 11,500 lbs. What is your decision? Will you allow the truck to continue or will you call the driver and tell him/her to turn back? Show all of your calculations.
- Discuss several types of sampling: e. convenience sampling, random sampling, stratified sampling, systematic sampling or cluster sampling. Discuss which type of sampling is used in this scenario.
- Discuss what sampling bias is. Do you believe that using the 30 boxes in your warehouse caused sampling bias?
- What does the central limit theorem state and why is it important to solving this problem. Is the thirty boxes of ball bearings enough to predict the probability of safely going over the bridge?

Use the template provided to complete a 5-page report (excluding the cover page). NOTE: Please delete all instructions and examples before submitting your work.

Submitting your assignment in APA format means, at a minimum, you will need the following:

**Title page:**The title should be in all capitals.**Length:**5 pages minimum**Body:**This begins on the page following the title page and abstract page and must be double-spaced (be careful not to triple- or quadruple-space between paragraphs). The typeface should be 12-pt. Times Roman or 12-pt. Courier in regular black type. Do not use color, bold type, or italics, except as required for APA-level headings and references. The deliverable length of the body of your paper for this assignment is 5 pages. In-body academic citations to support your decisions and analysis are required. A variety of academic sources is encouraged.**Reference page:**References that align with your in-body academic sources are listed on the final page of your paper. The references must be in APA format using appropriate spacing, hanging indent, italics, and uppercase and lowercase usage as appropriate for the type of resource used. Remember, the Reference page is not a bibliography but a further listing of the abbreviated in-body citations used in the paper. Every referenced item must have a corresponding in-body citation.

Title of the Document

Student’s Name

American Intercontinental University

Running head: STUDENT’S TOPIC

STUDENT’S RESEARCH TOPIC 4

Abstract:

*[(Don’t Indent) In 150 words or less, summarize your Breadth paper. What is the paper about and explain your conclusion.] *

**Introduction**

** [Explanation **

**Scenario Analysis**

** [Explanation **

**Calculate the Mean and the Standard Deviation of this sample**

*[In this section, you will take the weights of the 30 Ball Bearing boxes in the plant and calculate the mean and standard deviation of them. Information on how to calculate the mean and the standard deviation is located in chapter 2 of the textbook.]*

**Using the normal distribution curve, calculate the probability the truck’s total weight is under 11,500 lbs. What is your decision? Will you allow the truck to continue or will you call the driver and tell him/her to turn back? Show all of your calculations**

*[To determine this probability, you will take the mean and standard deviation from the previous section and calculate the Z-score. This Z-score will be used in the normal distribution table in the appendix section of the book. Information on how to calculate the Z-score and determining probability from the normal distribution table is located in chapter six of the textbook. In order to calculate the Z-score, you will need to calculate X. X is the maximum average weight of the boxes that will allow the truck to cross the bridge safely. Subtract the total weight of the empty truck (with driver) from the bridge limit to get the maximum weight of the 74 boxes of ball bearings. Using this, you can calculate the value of X (the average weight of a single box.]*

**Discuss several types of sampling: i.e. convenience sampling, random sampling, stratified sampling, systematic sampling or cluster sampling. Discuss which type of sampling is used in this scenario.**

*[These sampling types are discussed in chapter 1 of the textbook. Based on their characteristics, which sampling type appears to have been used in the case study?]*

**Sampling Bias**

*[In statistics, a sampling bias is created when a sample is collected from a population and some members of the population are not as likely to be chosen as others. Sampling Bias is discussed in chapter 1 of the textbook. Do you feel that 30 boxes sampled in this case study created a sampling bias? Why or Why not?] *

**What does the central limit theorem state and why is it important to solving this problem. Are the thirty boxes of ball bearings enough to predict the probability of safely going over the bridge?**

*[The central limit theorem is discussed in chapter 7 of the textbook. Hint: Without it, we would not be able to solve this problem.]*

**Conclusion**

** [Explanation **

References

Double space, do not indent, but do alphabetize. Use APA style. If the citation carries over to the next line, the lines will automatically be in hanging indent when you use the following template (overwrite the first two and when you hit <enter> twice after that, the references will fall in hanging indent naturally).

Applebaum, B. C., Zuckerman, M. Y., & Wu, X. (2014). Title of article in sentence case: Subtitle in sentence case. *Journal in Title Case*, *X, *45-56.

O’Hara, C. (1986). *Name of book in sentence case*: *Subtitle in sentence case.* City, ST: Name of Publisher.

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