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

question 64

Essay

According to a recent survey,women chat on their mobile phones more than men (CNN.com,August 25,2010).In order to determine if the same patterns also exist in colleges,Irina 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.It is not reasonable to assume equal population variances.
A)Specify the competing hypotheses to determine if female students chat,on average,more than male students.
B)Calculate the value of the test statistic and its p-value.
C)Make a conclusion at the 10% significance level.

• A)Specify the competing hypotheses to determine if female students chat,on average,more than male students.
• B)Calculate the value of the test statistic and its p-value.
• C)Make a conclusion at the 10% significance level.

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Definitions:

Concentration Ratio

A measure used to assess the degree to which a small number of firms dominate within an industry, often expressed as a percentage of total market share.

Concentration Ratios

Measures of market structure and competition which indicate the cumulative market share of the top firms in an industry.

Geographic Location

Geographic Location denotes the specific physical position of an entity on Earth's surface, influencing its economic activities.

Marginal Cost

The rise in complete costs associated with creating one more unit of a good or service.