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Damon is a used car salesman in Florida. The chance that he meets his monthly sales goals are as follows
Sales Prob.
$20,000 0.2
$30,000 0.2
$40,000 0.6
What can you expect his average sales to be for the month?
aluminum aircraft parts are always subject to possible corrosion. to prevent corrosion an anodizing solution is often
Develop a probability distribution for the number of travelers who plan their trips within two weeks of departure.
In a sample of 10 workers, what is the probability that exactly three workers take the public transport daily? [Hint: It is a Binomial Distribution Problem.]
With each hypothesis, indicate whether the appropriate analysis would be a one-tailed test or a two-tailed test and indicate a type I and type II error, given the context of the hypothesis.
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724, with a standard deviation of $15.
One particular morning, the length of time spent in the examination room is recorded for each patient seen by each physician at an orthopedic clinic. Does the data prove a significant diference in mean times, using a=.05 Minutes in Examination roo..
in a survey of undergraduate library usage it was found that 76 of seniors 59 of juniors 50 of sophomores and 28 of
Calculate the value based on this information. A new screening test for Lyme disease is developed for use in the general population. The sensitivity (ability to identify infected persons) is 60% and specificity (ability to identify non- infected p..
A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
Using the 7 steps in significance testing, determine whether there is a statistically significant difference between U.S. Air and the national average such that U.S. Air has longer flight delays. Show all 7 steps.
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
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