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1. An article in Baltimore Sun claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a Baltimore City Giant. The mean shopping time for the sample of 50 shoppers is 25.36 minutes, with a standard deviation of 7.24 minutes (estimated from the sample). Using the 0.10 level of significance, is there evidence that the mean shopping at the Baltimore City Giant is different from the claimed value of 22 minutes?
Why might driver be tempted not to use seat belt "just on this trip"?
In your environment (business or personal), please give an application of exponential smoothing and why you would use this technique.
Suppose that the scores of architects on a particular creativity test are normally distributed.
Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05).
There are 4 samples of 40 individuals each interviewed to find out how often they visit a fast food restaurant in the week.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
Give an example of some data that you could analyze with a Chi Square. Discuss the level of measurement that you would need to use this test.
Would the method described above be a good way to determine which team was taller (explain why or why not)?
A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
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