BAMS1743: A Researcher Wishes to Determine Whether Store Sales Depend on the Number of E-Wallet Channels Provided to Customers:

Question 3

a) A researcher wishes to determine whether store sales depend on the number of e-wallet channels provided to customers.

The following table shows the number of e-wallet channels and the sales achieved by 8 stores last week.

BAMS1743: Jan-2024 - Quantitative Methods (i) Calculate the product moment correlation coefficient.

(ii) Find the least squares regression equation of the sales on e-wallet channels.

(iii) Using the regression equation, estimate the sales of a store if the number of e-wallet channels available is ten.

b) The customers’ payments made via various e-wallet channels in a store over the past three weeks are given below:

BAMS1743: Jan-2024 - Quantitative Methods (i) Obtain a suitable moving average trend.

(ii) Calculate the average seasonal variations for the customers’ payment via e-wallet using the additive model.

(iii) Forecast the customers’ payment via e-wallet for Friday of the following week.