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