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A study on the number of mobile phones owned was conducted among the students in a college. A random sample of 5 students was taken and the data is tabulated below.
1 2 2 3 1
A) It is claimed that students own less than 2 mobile phones on average. Test if the claim is true at a 5% significance level.
The demand for movie rentals for a newly released movie is random. Suppose a movie rental store charges $2.50 for a new release rental and it costs the movie store $1.25 per copy of the movie
Suppose you know that male height (for adults) is normally distributed with a mean of 70 inches and a std dev of 3 inches. a) How many deviations is a 74.5 from the mean? b) What is the z value for 74.5? c) Why are they the same?
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
Research question: Are the mean annual attendance rates the same for employees in these three departments?
an airline accepts 10 reservations for a flight on a small plane with 8 seats. they know that 5 reservations go to
What is the probability that the order executed through this 5 subprocesses in series is defect free?
What can you infer from the statistics and what information might lead you to a different conclusion - what additional information would be valuable to help draw a more certain conclusion?
Any state auto insurance company took a random sample of 370 insurance claims paid out during a 1-year period. the average claim was $750 with a standard deviation of $150. find .99 confidence interval for the mean claim payment.
a group of 14 friends got together for a wine contest. each guest brought his or her favorite bottle of pinot noir.
Suppose that recently the hospital randomly sampled 10 patient bills and conducted a thorough study to determine whether an error exists. It found 3 bills with errors. Assuming that managers are correct that they have improved the error rate to 0...
Assume that Los Arboles had a special program in place to encourage helmet use. Elucidate to what extent did removal of the outlier improve the fit.
The standard deviation of 0.01 inches. What is the probability that a randomly selected pencil will be less than 0.285 inches?
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