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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.09 margin of error, use a confidence level of 90%, and use results from a prior poll suggesting that 14% of adults have consulted fortune tellers.
The mode for a set of n = 50 responses to this question. Which of the following statements accurately describes the measures of central tendency?
identify a pair of variables for which you would expect to see a strong correlation but not a cause-and-effect
a sample of a given size is used to construct a 95 confidence interval for the population mean with a known population
A recent report from the American Medical Association claims that for the first time in ten years, the average salary of psychiatrists was greater than $190,000 with a standard deviation of $27,000. What is the null hypothesis for his claim?
data obtained from a random sample of recent years of caribou and wolf population.caribou x 30 34 27 25 17 23 20wolf y
Test the claim that the Snickers bars have a mean weight that is different than 20.1 grams. Because shutting down the plant is very expensive, test the claim at the .01 level of significance.
Variations of the Monty Hall problem - find out in advance which door has the car behind it. In the spirit of "the show must go on," he makes a guess at which of the two doors to open and gets lucky, opening a door behind which stands a goat. Now ..
an insurance company receives an average of 100 claims per month and each claim results in a payment independently of
Compute the sellers expected revenue if the number of bidders goes to infinity - Show that the equilibrium strategies obtained above (for both first- and second-price auctions) still hold under any tie-breaking rule.
What proportion of children 10 to 15 years of age would be classified as hyperlipidemic assume that hyperlipidemia is defined as cholesterol level over 200?
The differences and similarities between descriptive and inferential statistics will also be examined with examples provided for each.
A poll found that 69.9% of citizens felt the government was not working well. If 7 people were randomly selected, what is the probability that all 7 felt the government is not working well?
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