which of variables are we able to meaningfully create a mean, and what are the mean values

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

1) The variable ratebal, is what sort of data measurement scale?

2) If we replaced the code values with actual percentage values, ratebal would be what sort of data measurement scale?

3) The variable card, is what sort of data measurement scale?

4) The variable age, is what sort of data measurement scale?

 5) Which of variables are we able to meaningfully create a mean, and what are the mean values?

6)  Run a correlation between annfee and intent. What is the correlation value and what does this show about the relationship between these 2 variables.

7)  Approximately what percentage of the respondents would choose the credit card offered to them? Which analysis tool did you use to calculate this?

8) Management at Woolworths expected that less than quarter of its target customers would choose the credit card offered to them. What should the alternate hypothesis be to test this proposition? Is the test one-tail or two-tail test?

 9)  Management at Woolworths expected that less than quarter of its target customers would choose the credit card offered to them. Based on the data we have, what is your test conclusion regarding Ho:  (population proportion) < 25%?

 10)  What is the 99% confidence interval (Cl) for the variable of intent? What is the correct relationship between 99% Cl and 95% Cl?

11)  What is your conclusion for testing the null hypothesis, with an alpha of 0.05,  that buying intention measured on the 10-point graphic rating scale is 8 on average?

12)  Is it appropriate to run a linear regression using intent as the dependent variable and card as the independent variable? What is the reason?

 13)  Whal is your conclusion for the independent samples t·test comparing buying intention scores between gender? Provide Levene’s test of variance in your answer.

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