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A sample of 25 novels has a standard deviation of 9 pages. Find the 95% confidence interval of the population standard deviation. (LET SD be the symbol for standard deviation as in sigma)
odds makers try to predict which professional and college football teams will win and by how much the spread. if the
Conduct a test for checking that the proportions of women and men that liked commercial A are the same versus the two-sided alternative at the 5% level.
the following data is the square footage in thousands of square feet and annual sales for a sample of 14 branches of
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?
What type of probability distribution is presented? Find the probability that exactly 5 of his saplings will die in that first winter. Round to 4 decimal places. Find the probability that 5 or less of saplings will die in that first winter. Round to ..
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
the data from an independent-measures research study produce a sample mean difference of 6 points and an estimated
consider a carton of twelve eggs of which three are rotten. suppose we randomly select five eggs. compute the
the sample revealed a sample mean of 11.7 ounces with a standard deviation of .8 ounces test to see if the population mean is at least 12 ounces using the .05 level of significance.
Suppose that by the end of 2009, that percentage was 85%. If a sample of 10 U.S. adults is selected, what is the probability that:
Montreal and ask them if they would be comfortable with a woman asking them out for a date. If the claim made by the study was true, what is the probability that At most 4 men would say no?
Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:
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