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Wade (Retail) looked at a random sample of 100 invoices from a large population. Eight of these contained an error. What are the 90% and 95% confidence intervals for the proportion of invoices with errors?
refer to the following frequency distribution for questions 1 2 3 and 4.the frequency distribution below shows the
Assume the results of different games played in the series are independent of each other. Find the p.m.f. of the distribution of N := duration" of the baseball series.
The quality control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of 8 syringes taken from the batch. Suppose the batch contains 1% defective syringes.
Probability that a home has a swimming pool is .38. What is the probability that a randomly selected home in the city has an attached garage and a swimming pool?
Standard deviation of $1.2 million in 2009. Suppose a sample of 100 major league players was taken. What was the standard error for the sample mean salary?
question zagats publishes restaurant ratings for various locations in the u.s.nbsp the excel file restaurants
Three dessert packages to choose from. In how many different ways could the couple select an appetizer package, a main course,and a dessert package?
Research results suggest that IQ scores for boys are more variable than IQ scores for girls (Arden & Plomin, 2006). A typical study looking at 10-year-old children classifies participants by gender and by low, average, or high IQ.
To evaluate average annual expenses of students on books and class materials sample size 36 is taken.
a researcher is considering using 90 confidence interval for his research project instead of 95. what happens to the
The route used by a certain motorist in commuting to work contains tow intersections with traffic signals. The probability that he must stop at the first signal is 0.4, the analogous probability for the second signal is 0.5. and the probability th..
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
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