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The McBurger restaurant chain claims that the waiting time of customers for service is normally distributed with a mean of 3 minutes and a standard deviation of 1 minute. The quality assurance department found in a sample of 50 customers at the Warren Road McBurger that the mean waiting time was 2.75 minutes. At the 0.05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Identify the null and alternative hypothesis, test statistics, p-value or critical value(s), conclusion about the null hypotesis and final conclusion that address the original claim.
Describe when a z-test should be performed as opposed to a t-test? Which (if any) can we use all the time? Why or why not?
If he finds differences, then he may realize that, 1) he will need to evaluate his course ethnic sensitivity,
A marketing firm recently studied the number of times men and women who live alone that buy takeout dinners in a month. Two independent samples were taken one with 50 men and 55 women.
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
Electronic baseball games manufactured by Tempco Electronics are shipped in lots of 25. Before shipping, a quality control inspector randomly selects a sample of 6 from each lot for testing. If sample contains any defective games, the entire lot i..
Using the probabilities above what is the expected size of family you draw?
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
To find out the alternate hypotheses also critical value. A truck dealer claims where a new model will give trouble free service for at least 15,000 miles.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
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