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The following data represents the amount of time ( in minutes ) that a person had to wait for a bus to work on a random sample of 5 working days.
6--8--5--7--5
Assume that waiting times are approximately normally distributed.
Construct a 98% confidence interval for the population mean of waiting times.
According to the 1996 Statistical Abstract of the United States, 7.6% of the scores on the verbal portion of the Scholastic Aptitude Test (SAT) exceeded 600.
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
The Precision Scientific Instrument Company manufactures thermometers which are supposed to give readings of 0o C at the freezing point of water.
The Minneapolis Tribune ran an article on gender differences in shopping behavior. When 400 women were asked to respond to the question "Where I shop is influenced by which store has a greater variety," 60% answered "Yes.
Find the Probability and inverse probability for the given Normal distribution.
Determine the point estimate? Give the symbol and value.
Tom Sevits is the owner of the Appliance Patch. Recently Tom observed a difference in the dollar value of sales between the men and women he employs as sales associates.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
If the mean number of serious accidents per year in a large factory (where the number of employees remains constant) is five, find the probability that in the current year there will be:
If 1 man aged 18-24 is arbitrarily chosen, determine the probability that his serum cholesterol level is between 165 and 200.
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