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A random sample of thirty words from Jane Austen's Pride and Prejudice had a mean length of 4.08 letters with a standard deviation of 2.40. A random sample of thirty words from Henry James's What Maisie Knew had a mean length of 3.85 letters with a standard deviation of 2.26. Which of the following is a correct expression for a 95% confidence interval for the difference in mean word length for these two novels?
members of the senate took a battery of tests to assess their abilities. in the talking as if you are saying something
A company believes its market share is about 14%. Find the minimum required sample size for estimating the actual market share to within 5% with 90% confidence.
Suppose the null hypothesis, H0, is: the blood cultures contain no traces of pathogen X. State the Type I and Type II errors.
In 2013 these scientists counted 175,500 ducks, of which 33,100 were Mallards. Find a point estimate for the proportion of Mallards that were observed during the 2013 winter duck count.
q1. use maslows hierarchy of needs to discuss the extent to which growth needs influence personality formation.q2.
Use the above results and write the regression equation that can be used to predict sales. Estimate the sales volume for an advertising expenditure of 3.5 million dollars and 45 salespeople. Give your answer in dollars
Make a scatterplot of the data. Find the equation of the least-squares regression line for predicting BAC from number of beers and add this line to your plot
Keno Keno is a favorite game in casinos, and similar games are popular with the states that operate lotteries. Balls numbered 1 to 80 are tumbled in a machine.
the annual assets for first michigan corporation is aproximately normally distributed with standard deviation 50. the
The calculated value of F in a one-way analysis is 8.23. The numerator degrees of freedom and denominator degrees of freedom are 4 and 8, respectively.
Results were : X Bar=24,000 and S=1400. Build to 90% CI for the money set aside by the similar companies.
The company believes that the price elasticity for this product is about -2.5. If it decreases its price to $63, what should be the quantity sold? Will the revenue increase? Why
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