Business Analytics

YOU ARE REQUIRED TO DO PART 1 AND PART 2
Part 1: Data Analysis:
1. (a) Please provide me with a 90% confidence estimate of the mean monthly bill for ALL smartphone users?

You will need to calculate an estimate of the mean monthly bill for ALL smartphone users, not just the ones in the sample.
For the memorandum, you will need to be able to interpret your result as demonstrated in the lecture and tutorial.
HINT: Week 7 materials may be helpful.

1. (b) Please provide me with a 90% confidence estimate of the proportion of ALL smartphone users who are on a post-paid plan?

Before you can calculate an estimate of the proportion of ALL smartphone users who are on a post-paid plan, you will need to first determine the relevant sample proportion from your data.
For the memorandum, you will need to be able to interpret your result as demonstrated in the lecture and tutorial.
HINT: Week 7 materials may be helpful.

2. In a previous issue of our magazine we wrote that, on average, smartphone users spend more than $61.50 on their monthly bill. Please check if this is still the case (at 5% significance)?

You will need to test the previous issue’s statement using the appropriate technique.
For the memorandum, you will need to be able to interpret your result as demonstrated in the lecture and tutorial.
HINT: Week 8 materials may be helpful.

3. Another statement we had in our previous article on this topic was that less than 65% of smartphone users are on a post-paid plan. Please verify this (at 5% significance).

You will need to test if the previous article’s statement is still true by using the appropriate technique.
For the memorandum, you will need to be able to interpret your result as demonstrated in the lecture and tutorial.
HINT: Week 8 materials may be helpful.

4. Please check if there is a difference in the mean monthly bill between ALL male and ALL female smartphone users(at 90% confidence).

You will need to find out if there is a difference in the mean monthly bill between ALL male and female smartphone users, not just the ones in the sample.
For the memorandum, you will need to be able to interpret your result as demonstrated in the relevant