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The student organization is planning to ask the sample of 50 students if they have observed alcohol abuse brochures on campus. Sample percentage who say "Yes" will be reported. Organization's statistical advisor says that standard deviation of this percentage will be about 7%.
a) Determine standard deviation be if sample contained 100 students rather than 50?b) How large the sample is required to decrease standard deviation of percentage who say "Yes" from 7% to 3.5%? Describe to someone who knows no statistics advantage of taking a larger sample in survey of opinion.
A concessionaire for the local ballpark has made a table of conditional values for the different alternatives also states of nature
A major issue facing many states is whether to legalize casino gambling. Suppose the govenor of one state believes that more than 55% of the state's registered voters would favor some form of legal casino gambling.
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
Using t test for significance of slope to determine whether the independent variable is a significant predictor of the dependent variable - Find the sum of the least squares slope and intercept parameter?
Determine the expected market return on $ 20,000 if the expected return on asset is 20%, its beta is 1.5, and the risk free rate is 5 percent?
The Ludlow Wildcats baseball team, a minor league team in the Cleveland Indians orgainzation, plays 70 precent of their games at night and 30 percent during the day.
How many men and women are needed to generate a 95% confidence interval estimate for the difference in proportions with a margin of error not exceeding 4%?
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people, with 10 having a common attribute.
Delivery Format The General Social Survey asks, "About how often did you have sex in the past 12 months?" About 47% of respondents indicated they had sex at least once a week.
Calculate the population mean margin of error for a 90% confidence interval when sigma is 4 and sample size is 36. Standard IQ test has mean of 98 and standard deviation of 16.
Describe the "third variable problem" as it relates to correlation and provide an example of how you might see this played out in your own field.
Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would
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