Wk 4 Discussion – Central Tendency [due Thurs] The attachments are screenshots of the chapters.
Post a total of three (3) substantive responses over at least two (2) separate days for full participation. These posts include your initial discussion, and two (2) replies to your classmates.
Word count is not measured; however, ensure there is enough discussion to have a substantive response.
Due by Thursday (40 points)
Initial Discussion. Respond to each of the following eight (8) questions:
Read and understand the selected learning objectives in the Lind et al. (2021) textbook.
Chapter 7: LO7-2 Normal Probability, LO7-3 Standard Normal Probability Distribution (calculation)
Chapter 8: LO8-1 Sampling Methods, LO8-3 Sampling Distribution of the Mean
Chapter 9: LO9-1 Point Estimate, LO9-2 Confidence Interval for Population Mean (calculation), LO9-2 Population Standard Deviation, σ Unknown
7A. What are the characteristics of a normal probability distribution?
7B. The weekly incomes of shift foremen in the glass industry follow the normal probability distribution with a mean of $3,500 and a standard deviation of $1.000.
What is the z value for the income of a foreman who earns $3,000 per week?
8A. Explain why a researcher would sample a population. For instance, why take 1200 valid samples of registered U.S. voters?
8B. Describe four random sampling methods (and the advantages).
9A. What exactly is a point estimate? For instance, what would be a point estimate of these five flower heights (ft.): 5, 6, 7, 8, 9
9B. A confidence interval is used in the election polls. On the CBS Evening News, it showed Candidate A at 52% and Candidate B at 45%. The margin of error was 6%. Explain how Candidate B could win.
The mean yearly income for construction works in New York has been calculated as $88,000, with a range of $85,000 to $91,000.
9C1. If a confidence interval of 95% has been calculated with respect to this data, what does that confidence interval tell us?
9C2. What is the effect on the confidence interval gap width as the sample size increases?
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more