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When we have several criteria with different scale, for ranking can we add values after standardization? for exaample for ranking websites we have number of visitors and page load time and size and... if we standardized values by z, then can we add the values for ranking?
Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.
Compute the difference in traffic counts on the 6th and the 13th. Can you conclude that people tend to stay home more on Friday the 13th?
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
Suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroken eggs.
How large of a sample would be necessary if no estimate were available for the proportion that support current policy?
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Jolt agrees to replace any connector that fails within 19 months. Out of 500 connectors sold, how many does Jolt expect to replace on average?
A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows:
Estimate the probability that a randomly selected jar will have a fill, x, that is out of specification. Assume that the process is in control and that the population of all jar fills is normally distributed.
Stem Cell Survey - Adults were randomly selected for a Newsweek poll. They were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos.
Lead-time demand is 600 pounds. The standard deviation of lead time demand is 52 pounds. Supposing the lead time demand is normally distributed and that an acceptable risk of stocking out is 4%:
Construct the sampling distribution of the mean for the random samples of size 2 from the population. Calculate the mean and the standard deviation of the sampling distribution.
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