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Question: 1. Mensa is an organization of people who have high IQs. To be eligible for membership, a person must have an IQ "higher than 98 percent of the population." What IQ is required to qualify?
2. The mean height of American women aged 20-29 is 64.2 inches, with a standard deviation of 2.5 inches (Statistical Abstract of the United States: 2009, 2008).
a. What height divides the tallest 5 percent of the population from the rest?
b. The minimum height required for women to join the U.S. Army is 58 inches. What proportion of the population is excluded?
Draw the Normal model for tree diameters.- What size would you expect the central 95% of all trees to be?- About what percent of the trees should be less than an inch in diameter?
Several studies have proposed an extravehicular robot that could move around in a NASA space station and perform physical tasks at various worksites [9]. The arm is controlled by a unity feedback control with loop transfer function
Generate 500 different random samples of n = 5 observations. Draw a sketch showing the shape of the histogram of sample means for random samples of n = 5.
Examine relationship between GNP per capita and the percentage of respondents willing to pay more taxes. Create a table using the data below for the GNP per capita and the percentage willing to pay higher taxes.
In the graphical method, how do you know when a problem is infeasible, unbounded, or when it has multiple optimal solutions? Give a real-world example of when you could have an infeasible problem.
Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
What size random sample should you take if you want to estimate the annual salary in the population with 99 percent confidence and a maximum margin of error of $250?
How would you gather your data? What would you use to validate your forecasting model? Would you look at the forecasting errors? What program would you use to make your forecast (i.e. Excel or Excel QM)
Construct the 95% confidence interval for the proportion of students with at least one injury.
Although y has a highly skewed distribution, the sampling distribution of y¯ is approximately normal. Why?- Find the probability that the sample mean time until the first critical part failure exceeds .13 hour.
Speedy Wheels is a wholesale distributor of bicycles. Its Inventory Manager, Ricky Sapolo, is currently reviewing the inventory policy for one popular model that is selling at the rate of 250 per month.
three experiments delving into the relationship between the neccecisity for cognitive closure and persuasion were
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