An Internet Service Provider Is Interested in Testing to See

question 160

Multiple Choice

An Internet service provider is interested in testing to see if there is a difference in the mean weekly connect time for users who come into the service through a dial-up line,DSL,or cable Internet.To test this,the ISP has selected random samples from each category of user and recorded the connect time during a week period.The following data were collected: Based upon these data and a significance level of 0.05,which of the following statements is true?

• A)The F-critical value for the test is 3.555
• B)The test statistic is approximately 43.9
• C)The null hypothesis should be rejected and conclude that the mean connect times for the three user categories are not all equal.
• D)All of the above are true.

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Definitions:

Mania

A mental state characterized by extreme energy, euphoria, hyperactivity, and a reduced need for sleep, often seen in bipolar disorder.

Hypomania

A milder form of mania, characterized by elevated or irritable mood, increased activity or energy levels, but not severe enough to cause significant impairment.

Depression

A common mental disorder characterized by persistent sadness, loss of interest, and a lack of energy or drive, often accompanied by physical symptoms.

Rapid Cycling

A term in bipolar disorder characterized by four or more episodes of mania, hypomania, or depression within a year.