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A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 2, 4, 6, 8, or 11 days last month. Number of days absent Probability 0 0.30 2 0.27 4 0.05 6 0.30 8 0.08 11 0 What is the mean number of days absent?
0.08 0.19 0.91 3.18
If zero can be the first digit and the numbers can be repeated, what is the probability Mr. Jones and Mrs. Smith select the same PIN? (Round your answer to 3 decimal places.)
the equation for a regression line predicting the numbers of hours of tv watched by children y from the number of hours
1.a statistics instructor wants to know which route will get her to school the fastest. each day from october 2 to
suppose that airplane engines operate independently and fail with probability equal to 0.4. assuming that a plane makes
The standard deviation of the population is 0.6 ounces. Which of the following is the 95% confidence interval for the mean weight per white mice?
Deductible amount and limits of liability, are standardized. The sample information is reported below. At the .10 significance level, can we conclude that there is a difference in the amounts quoted?
When you calculate CIs for time on task, I notice that you use the critical value from the t-distribution (TINV(0.05, degrees_of_freedom))
the waiting time for an incoming call at the front desk of a sales store has an exponential distribution. during
a repeated-measures analysis of variance with a sample of n 8 participants produces df within treatments 14. what is
Suppose that your sample mean is 1175 and that your sample standard deviation is 100. Using α=0.05, what is the appropriate conclusion you should draw from your sample?
Quarterly customer surveys are taken at a medical center. Each individual department has scores and is comparted to the medical center average. Department of Physical Therapy had scores of 9.14, 9.19 and 7.75 for quarters 1-3 respectively.
If 134 out of a random sample of 235 college students expressed an intent to vote, can we reject the aide's estimate at the 0.05 level of significance? Perform a one-tailed test.
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