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Question: The performances of a group of interns are evaluated by their supervisors at the end of their internships.
Their scores are: 55, 47, 62, 27, 50, 49, 66, 53, 50, 44, 63, 59.
Complete the calculations below using this data. Show all of your work and clearly label each of your calculations.
a. the mean b. the median c. the range d. the standard deviation e. the variance
What is the probability that the sample will have between 50% and 60% of the identifications correct? What is the probability that the sample percentage of correct identifications is greater than 65%?
A cell phone company collects data from a random sample of 500 households. The results indicate that 135 of the households would add an extra cellular number, provided it was offered at a reduced monthly cost.
If customers arrive according to a non-stationary Poisson process with rate function λ(t) = sin(t) + 5, is the time between the arrivals an exponential distribution?
What are the null and alternative hypotheses to test if the new battery has longer life than the old battery? Draw a conclusion for the hypothesis test. Make sure you state your conclusion in the context of the problem.
Where should the warranty limits be set so that only 10 percent of the HDTVs need repairs at the manufacturer's expense?
If a six appears for the second time, the process is repeated with the move depending on the number shown and the previous throws. If a six appears for the third time, the turn of the player ends without moving the token.
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
A mean of 22 miles-per-gallon and a standard deviation of 5 miles-per-gallon. What is the probability that a car will get less than 21 miles-per-gallon.
A ski company in Vail owns two ski shops, one on the east side and one on the west side. Sales data showed that at the eastern location there were 56 pairs of large gloves sold out of 304 total pairs sold.
Specification limits for a particular characteristic of a product indicate the values at which the product will operate properly. Assume we have a product with an upper specification limit of 7.25 and a lower specification limit of 4.0. As long as..
In as sample of 855 bartenders, 48% report hearing complaints from patrons about their jobs. If the maximum error of estimate for the proportion of bartenders hearing job complaints is 4.4 percentage points, what is the degree of confidence used?
Assume that the population proportions are to be estimated from the samples described. Find the margin of error and the 95% confidence interval.
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