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Suppose that the starting salaries of female math professors have a positively skewed distribution with mean of $56,000 and a standard deviation of $12,000. The starting salaries of male math professors are positively skewed with a mean of $50,000 and a standard deviation of $10,000. A random sample of 50 female math professors and a random sample of 40 male math professors are selected. What is the probability that the sample mean salary of male math professors will not exceed that of the female math professors?
Perform hypothesis testing on one variable's data.
For the grand opening, an arena has selected 5 finalists, each of whom will win a season ticket located in one of 5 sections: The upper balcony, lower balcony, main floor, courtside, or a luxury box.
Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated.
One of these has a history of selling an average of 200 items, with a standard deviation of 20. If he wants to maximize his profits, how many should he order?
If np ≥ 5 and nq ≥ 5, estimate P (more than 5) with n=14 and p=0.3 by using the normal distribution as an approximation to the binomial distribution; if np
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers. Assume that the president is correct..
The availability of venture capital provided by big boost in funds available to companies recent years. According to Venture Economics, 2,000 venture capital disbursements were made in 1999.
Recognize the midpoint of the first class. Recognize the class boundaries of the first class.
What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?
By law of averages. Bystander suggests him to quit, on ground that his luck is cold. Who is correct? Or are both of them wrong?
What can be done to remedy multicollinearity? Use ANOVA instead of Regression.
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