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Suppose that the distribution of weekly water usage for single-family homes in a particular city is mound shaped and approximately symmetric. The mean is 1400 gallons, and the standard deviation is 300 gallons.
a) What is the approximate value of the 16th?
b) What is the approximate value of the median?
c) What is the approximate value of the 84th?
The area under the standard normal curve between 0 and 2 is twice the area under area between 0 and 1.
Re item 4, assume the critical value for this test is 4.92, and you obtain a computed statistical value of 7.45. Is there evidence to refuse null hypothesis? Describe why or why not?
The probability that a bomber hits a target on a bombing mission is 0.700. Three bombers are sent to bomb a particular target.
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
Now compute the standard deviation for this distribution.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Listed below are weights in grams from a sample of these bats. Construct a 95% confidence interval estimate of their mean weight.
How many commercials' worth of data do I need to have a margin of error no more than 3, the correct set of hypotheses
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. Give the formula for the test statistic.
Computing the probability values using normal distribution - Find the probability that a regular rat (without the supplement) would solve the maze with a score less than or equal to X = 24 errors?
Visits to Web sites. What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take first place, but about 50 percent of male Internet users in this age group visit an auction site such as eBay at least once a month. Inte..
Use MegaStat's output for multiple regression to determine the multiple regression equation
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