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In a council election, 5 people are running, 3 seats available, and you want two for sure to win,but no caring who the third is. Should you only vote for the two candidates that you want and leave the third ballot blank or should you vote for the two you want and write-in a random name on the third ballot? Could that throw off the election for the other three? Would it matter statistically?
A salesperson goes door-to-door in a residential area to demonstrate the use of a new household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) i..
Some of these items are not up to quality specifications and have to be thrown out. At this rate, how many mistakes can be made while maintaining an acceptable success rate?
Suppose that verbal scores on SAT exam have a normal distribution with a population mean 500 points and population standard deviation of 100.
How much would ING be willing to pay if the General Counsel could arrange for an absolutely reliable mock trial?
Suppose that you have a sample mean of 49 and a standard deviation of 3, but now found those values from a sample of 20 observations. test the hypothesis allowing for type 1 error to equal .05.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
Privacy Are your finances, buying habits, medical records, and phone calls really private? A real concern for many adults is that computers and Internet are reducing privacy. A survey conducted by Peter D.
What is the probability that a soldier is a female?
A standard for full credibility of 1,000 claims has been selected so that the actual pure premium will be within 10% of the expected pure premium 95% of the time. The number of claims has the Poisson distribution. Determine the coeffcient of vari..
The combined SAT scores of students are normall distributed with a mean of 950 and a standard deviation of 200. What are the minimum and the mximum values of the middle 87.4% of the scores.
During a 52 week period, a company paid overtime wages for 18 weeks and hired temporary help for 9 weeks. During 5 weeks, the company paid overtime and hired temporary help
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?
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