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The number of students visiting their professor during office hours each day has a Poisson distribution with average of 5 students every two days. For a given day, find the probability that at least 2 students see the professor.
If one employee is randomly selected, find the decimal probability (four decimal places) that his/her commute takes the following amount of time.
Suppose normality, determine a 90% confidence interval for population variance.
The best we can do is to use one-way ANOVA and make sure to randomize the treatments to the experiment units. Why is such a randomization important?
One of the herpetologists fears that pollution might be affecting the natural growth of the pythons. Do you think this sample result is unusually small? Explain. Show work.
Digital camcorder repair service has set the goal not to exceed average of 5 working days from time unit is brought in to time repairs are completed. Compute the t-value.
In a random sample of 150 freshman applications received thus far, 67 of the applicants request financial aid. Is there evidence that the proportion of next year's freshmen class needing financial aid has increased?
2 cards drawn from a 52 but before the second card is drawn you put the first one back and reshuffle the deck. Are the outcomes on the two cards independent and why?
If no calls are currently being processed, what is the probability the agent can take 3 minutes for personal time without being interrupted?
Suppose these data represent whole population. Determine the population mean and population standard deviation.
Suppose you conduct survey asking people if they support something or if they like some product or if they watch some TV-show.
Probability values based on normal distribution - old exit exam followed a normal distribution
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price nationwide is $1.50 per gallon for self-serve regular unleaded.
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