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Find the sample size required for a margin of error of 3.0 percentage? points, and then find one for a margin of error of 1.5 percentage? points; for? both, use? 95% confidence. Find the ratio of the larger sample size to the smaller sample size. To reduce the error by? half, what do you need to multiply the sample size? by?
Use the shortcut formula where n represents the population size and m represents the margin of error in decimal? form, to find the necessary sample size required for a margin of error of percentage points.
Checking the Normality of losses. Do the losses on the 120 individual patients in given Table appear to come from a single Normal distribution?
One thing you have learned is that the tangency portfolio will give you the maximum Sharpe ratio. Consequently, you have constructed such a portfolio. What are you portfolio weights.
To test whether there is a tendency for cancer patients to hold on to life long enough to survive for a holiday or birthday, researchers gathered data
Suppose a random sample of 137 households in Detroit was taken as part of a study on annual household spending for food at home.
Faced with rising fax costs, a firm issued a guideline that transmissions of ten pages or more should be sent by two-day mail instead. Exceptions are allowed, but they want the average to be ten or below. Use Excel to find the right-tail p value
a survey is taken in which 40 randomly selected respondents aged 25-40 are asked how many biological children they
The random variables XI, X2.• • • Xn are independent and identically distributed binomially with parameters in and p. They thus have the same probability function
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
using the methods of joints determine the force in each member of the truss shown. state whether each member is in
Table shows the distribution of household income in 1999-2002 for three geographical areas in the UK. Using diagrams compare these distributions.
Removing oil from a water/oil mix. In the oil industry, water that mixes with crude oil during production and transportation must be removed.
Regulating access. When a random sample of 935 parents were asked about rules in their homes, 77% said they had rules about the kinds of TV shows.
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