Social networking and online communication have revolutionized modern communicat

Question

Social networking and online communication have revolutionized modern communication. A professor of communications collected data on the social networking and online communication habits of a random sample of undergraduate college students. She has a number of questions of interest she would like to use the data to address but she is not sure which statistical technique to us. One important aspect in statistics is to understand which statistical methods or procedures are appropriate to use to address the research problem or question of interest. For each of the five research questions below, you are asked to select the corresponding statistical analysis technique most appropriate for addressing that research question. Note this involves selecting both the type of procedure (confidence interval or hypothesis test) and the parameter of interest.

Question 8 Subquestions

8.a

1 point(s)

Research Question #1:

Among the population of all undergraduate college students, she wants to assess if the proportion of women with a Facebook account is higher that the proportion of men with a Facebook account.

Saved

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

Confidence Interval to estimate a population mean difference

Hypothesis Test about a population mean difference

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

8.b

1 point(s)

Research Question #2:

The researcher wants to estimate the population average increase in the number of emails sent in a typical week when students are in college as opposed to when they were in high school (by recording the number of emails sent in October of a student's final year in high school and the number of emails sent in their first October of college).

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

Confidence Interval to estimate a population mean difference

Hypothesis Test about a population mean difference

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

8.c

1 point(s)

Research Question #3:

The researcher wants to estimate the proportion of all undergraduate college students with a LinkedIn account.

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

Confidence Interval to estimate a population mean difference

Hypothesis Test about a population mean difference

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

8.d

1 point(s)

Research Question #4:

The researcher would like to determine if, on average, first year undergraduate college students spend more time on social networking sites in a typical day than upperclassmen undergraduate college students.

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

Confidence Interval to estimate a population mean difference

Hypothesis Test about a population mean difference

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

8.e

1 point(s)

Research Question #5:

The researcher would like to evaluate the claim that undergraduate college students have, on average, more than 300 Facebook friends.

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

Confidence Interval to estimate a population mean difference

Hypothesis Test about a population mean difference

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

Explanation / Answer

Research Question #1:

Among the population of all undergraduate college students, she wants to assess if the proportion of women with a Facebook account is higher that the proportion of men with a Facebook account.

Ans:

Confidence Interval to estimate the difference between two population proportions (based on two independent random samples)

Hypothesis Test about the difference between two population proportions (based on two independent random samples)

Research Question #2:

The researcher wants to estimate the population average increase in the number of emails sent in a typical week when students are in college as opposed to when they were in high school (by recording the number of emails sent in October of a student's final year in high school and the number of emails sent in their first October of college).

Ans:

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

Research Question #3:

The researcher wants to estimate the proportion of all undergraduate college students with a LinkedIn account.

Ans:

Confidence Interval to estimate one population proportion

Hypothesis Test about one population proportion

Research Question #4:

The researcher would like to determine if, on average, first year undergraduate college students spend more time on social networking sites in a typical day than upperclassmen undergraduate college students.

Ans:

Confidence Interval to estimate the difference between two population means (based on two independent random samples)

Hypothesis Test about the difference between two population means (based on two independent random samples)

Research Question #5:

The researcher would like to evaluate the claim that undergraduate college students have, on average, more than 300 Facebook friends.

Ans:

Confidence Interval to estimate one population mean

Hypothesis Test about one population mean

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