Assignment
Question 1
Chicken Delight claims that at least 90 percent of its orders are delivered within 5 minutes of the time the order was placed. A sample of 100 orders revealed that 84 of them were delivered within 5 minutes. Using a level of significance of 0.05, carry out a hypothesis test for Chicken Delight's claim.
Question 2
As part of the quality control process, a chain of grocery stores carries out a monthly comparison of scanned prices to posted prices. The results of 200 prices are as follows:
Regular Price Items Sales Items
Scanned price was too low 9 3
Scanned price was too high 5 13
Scanned price was correct 73 97
Using a significance level of 0.05, carry out a contingency table analysis to test whether there is a relationship between scanning error rates and regular/sales price items.
Question 3
Find an article that was published in 2016 or 2017 that deals with the Consumer Price Index (CPI) and write a summary of at least 100 words. You must provide the article's URL (or provide the proper citation if it is a print article) in addition to your summary.
Question 4
Part (a)
Use the data in "Sales Forecasting.xlsx" to predict the company's sales for the 2nd quarter of 2017 via a linear trend regression.
Part (b)
Use the data in "Sales Forecasting.xlsx" to predict the company's sales for the 4th quarter of 2020 via a linear trend regression.
Part (c)
Which of the two forecasts (in Parts (a) and (b)) is likely to be more accurate? Why?
Attachment:- Sales_Forecasting.rar