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Dr. Smith is concerned about absenteeism among his statistics students. The information below reports the number...

Dr. Smith is concerned about absenteeism among his statistics students. The information below reports the number of days absent for a sample of 10 students during the last two-week exam period.

3 2 1 3 3 5 4 0 1 4

a- Determine the mean and the standard deviation of the sample.

b- What is the population mean? What is the best estimate of that value?

c- Develop a 95 percent confidence interval for the population mean.

d- Explain why the t distribution is used as a part of the confidence interval.

e- Is it reasonable to conclude that the typical student does not miss any days during an exam period?

Math   Statistics-And-Probability   
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