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The number of viewers of American Idol has a mean of 33 million with a standard deviation of 10 million. Assume this distribution follows a normal distribution.
What is the probability that next week's show will:
(a) Have between 37 and 44 million viewers?
Given that the landowner pays for the soundings test and the test indicates that gas is present, what is the landowner's revised estimate of the probability of finding gas in this site?
Seven students have applied for merit scholarships. This year 3 merit scholarships were awarded. If a random sample of 3 aplications (from the population of 7) is selected,
Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000.
A carton of 6 batteries contains 2 that are defective and 4 that are good. If we select 3 batteries at random form this carton, what is the probability that the sample contains exactly 1 defective battery?
When bucketing data for a histogram what is the standard way of dealing with data entries that are on the boundary of two buckets?
How many golfers must be surveyed if we want % confidence that the sample proportion has a margin of error of 0.025?
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..
You wish to be 95% confident and have an error of 0.4 mpg. The standard deviation is estimated at 1.8. How big must the sample be?
At the .05 level of significance, is there evidence that that the proportion of delayed Southwest Airlines departures from Phoenix in January 2008 is greater than 25%? State the decision in terms of the problem.
Forty percent of the sample wanted more local news. What is the 99% confidence interval for the proportion of readers who would like more coverage of local news?
Mean score on 10 item test for all students enrolled in a Traditional course was 9.64. A random sample of 41 students in Project Course is given same test
A sample from each population was selected at random and using the Kruskal-Wallis test, H was computed to be 2.11. What is your decision at the 0.05 level of risk?
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