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Before starting his campaign for mayor, Mr. Emory Board decided to do a study to see if there was a difference in the proportion of registered men and women voters who actually vote (so he would know whom to target his campaign toward). Of the 100 men and 150 women surveyed, 50 men and 100 women admitted to voting. What can he conclude at the .05 level of significance?
a) Direction = UPPER TAILED/LOWER TAILED/2-TAILED (circle one)
b) P-value = ________________
c) REJECT THE NULL or DO NOT REJECT THE NULL? (Circle one)
d) Can we conclude a difference in voting patterns for men vs. women? YES or NO (circle one)
In a regression model involving 30 observations, the following estimated regression equation was obtained:
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Find out the probability that at least one of the CD's is defective?
A typical problem statement is correlation research is _____________
How much would ING be willing to pay if the General Counsel could arrange for an absolutely reliable mock trial?
In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. Give examples of population members that might have been omitted:
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
Suppose that the number of babies born during an hour at a hospital's maternity wing follows a Poisson distribution with a mean of 4 per hour.
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