# Prior to beginning work on this discussion forum, read Chapter 7: Sampling and S

Prior to beginning work on this discussion forum, read Chapter 7: Sampling and S

Prior to beginning work on this discussion forum, read Chapter 7: Sampling and Sampling Distributions.
Provide an example of when you might want to take a cluster random sample instead of a simple random sample.
Explain what the advantages of a cluster sample might be.
Explain how you would choose the cluster sample.
Prior to beginning work on this discussion forum, read Chapter 9: Hypothesis Testing.
Apex Sports is thinking about entering the golf ball market. The company will make a profit if its market share is more than 15%. A market survey indicates that 128 of 758 golf ball purchasers will buy an Apex Sports golf ball.
Is the market survey alone enough evidence to persuade Apex Sports to enter the golf ball market?
How would you use hypothesis testing to help you make your decision if you were Apex Sports management and you required 90% confidence in your market research results? Does hypothesis testing support or not support entering the golf ball market? Show all your work.
Besides the market survey results, what other considerations might enter your decision on whether to enter the golf ball market?
If Apex Sports decides to enter the golf ball market, what are their probabilities for success?
part 2
Prior to beginning work on this discussion forum, read Chapter 11: Regression Analysis: Statistical Inference, paying attention to Section 11-7 on outliers and Figures 11.13, 11.14, and 11.15. Additionally, read Chapter 12: Time Series Analysis and Forecasting.
For this discussion,
Assess the use of various decision support tools and explain why outliers are sometimes called influential observations.
Discuss what could happen to the slope of a regression of Y versus a single X when an outlier is included versus when it is not included.
Will this necessarily happen when a point is an outlier?
Prior to beginning work on this discussion forum, read Chapter 10: Regression Analysis: Estimating Relationships.
Consider the relationship between yearly wine consumption (liters of alcohol from drinking wine, per person) and yearly deaths from heart disease (deaths per 100,000 people) in 19 developed countries. Suppose that you read a newspaper article in which the reporter states the following:
Researchers find that correlation between yearly wine consumption and yearly deaths from heart disease is 0.84. Thus, it is reasonable to conclude that increased consumption of alcohol from wine causes fewer deaths from heart disease in industrialized societies.