A Bloomberg BusinessWeek North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more, and 50% reported having an American Express credit card. 1. What is the population of interest in this study?2. Is annual income a qualitative or quantitative variable?3. Is ownership of an American Express card a qualitative or quantitative variable?4. Does this study involve cross-sectional or time series data?5. Determine whether the following two statistical inferences may be made based on the sample data collected.

1) For this case the population of interest is all the people suscribed to the Bloomberg Business Week North American.

2) For this case the income is a quantitative variable since is expressed in numbers and not with a nominal scale

3) That's a qualitative variable and on this case we can classify it as categorical since the possible values that takes are Yes or No.

4) Is a cross sectional study since the people is selected at some moment of the time and we don't have information through the time, for this reason we don't have a time series.

5) For this case we have these two important results:

Fifty-nine percent of the respondents indicated an annual income of $75,000 or more

And the other one is:

And 50% reported having an American Express credit card.

Step-by-step explanation:

1. What is the population of interest in this study?

For this case the population of interest is all the people suscribed to the Bloomberg Business Week North American.

2. Is annual income a qualitative or quantitative variable?

For this case the income is a quantitative variable since is expressed in numbers and not with a nominal scale

3. Is ownership of an American Express card a qualitative or quantitative variable?

That's a qualitative variable and on this case we can classify it as categorical since the possible values that takes are Yes or No.

4. Does this study involve cross-sectional or time series data?

Is a cross sectional study since the people is selected at some moment of the time and we don't have information through the time, for this reason we don't have a time series.

5. Determine whether the following two statistical inferences may be made based on the sample data collected.

For this case we have these two important results:

Fifty-nine percent of the respondents indicated an annual income of $75,000 or more

And the other one is:

And 50% reported having an American Express credit card.