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For the following questions, would the following be considered "significant" if its probability is less than or equal to 0.05?
a) Is it "significant" to get a 12 when a pair of dice is rolled?
b) Assume that a study of 500 randomly selected school bus routes showed that 480 arrived on time. Is it "significant" for a school bus to arrive late?
Testing for Population mean - Can the difference in average educational level between the sample and the nation be explained by chance variation?
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
By constructing null and alternative hypotheses, computing critical values, and comparing test statistic to critical value.
Multiple choice question based on multiple regression - The coefficient of determination for this model is
The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
A group of students collected data at the Cedar Point amusement park and reported that the "wait time" to ride the "Top Thrill Dragster" roller coaster is consistently distributed within a range of 40 minutes to 90 minutes.
Find out the probability of an event relies on past history of record data. The relative frequency method of computing the probability of an event relies on past history.
Construct the 95 percent confidence interval for the difference between the two population means.
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt "just on this trip"?
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