According to a Recent Survey,women Chat on Their Mobile Phones

question 5

Short Answer

According to a recent survey,women chat on their mobile phones more than men (CNN.com,August 25,2010).Irina wants to estimate the difference between the average chat time for female and male college students.She takes a random sample of 40 male students and 40 female students in her college.She finds that female students chatted for a sample average of 820 minutes per month with a sample standard deviation of 160 minutes.Male students,on the other hand,chatted for a sample average of 760 minutes per month with a sample standard deviation of 240 minutes.You may assume that the population variances are equal.
A)Construct a 95% confidence interval for the difference between the population means.
B)Can we conclude that average chat time is different between female and male college students with 95% confidence?

• A)Construct a 95% confidence interval for the difference between the population means.
• B)Can we conclude that average chat time is different between female and male college students with 95% confidence?

Understand the process and significance of constructing centered moving averages.

Learn about the application of regression analysis to find linear trend lines.

Master the calculation of seasonal indexes using moving averages and regression analysis.

Develop skills to plot time series and moving averages for visual trend analysis.

---

Definitions:

Sensation Seeking

The trait of searching for experiences and feelings that are varied, complex, novel, and intense.

Zuckerman

Refers to Marvin Zuckerman, a psychologist known for his research on sensation seeking and its influence on personality and behavior.

Questionnaires

A set of printed or digital questions used for gathering information from respondents for research purposes.

Locus of Control

The degree to which people believe they have control over the outcome of events in their lives, as opposed to external forces having that control.