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1. What is a z-score? What is the formula? Why is being able to compute a z-score important?
2. What is considered an unusual z-score? What is considered a very unusual z-score?
3. Provide an application problem where finding a z-score would be appropriate.
The sample of 200 voters and tests Ho: P=0.5 versus H1:P(not equal)0.5 at 5% level. What is the power of the test if the true value of P is 0.55?
a. Identify the claim and state H0 and Ha. b. Find the standardized test statistic z or t OR find the corresponding P-value.
Numbers of rooms in top spas. A report of a readers' poll in Condé Nast Traveler magazine ranked 36 top resort spas.- Rank all the observations together and make a list of the ranks for Group A and Group B.
Let X1, X2, X3, and X4 be independent continuous random variables with a common distribution function F and let p = P{X1 X2 > X3 X4}
Quality control. Sammy's Salsa, a small local company, produces 20 cases of salsa a day. Each case contains 12 jars and is imprinted with a code.
One of your customers, Margaret Port, has referred you to a friend who needs your Hercules Shelving for a storage warehouse
A population has parameters µ = 242.9 and s=79.2 . You intend to draw a random sample of size n = 107.
A three-dimensional vector random variable, X, has a covariance matrix.- Find a transformation matrix.
Scores of an iq test have a bell shaped distribution with a mean of 100 and a standard deviation of 16. Use the empirical rule to determine the following. What percentage of people has an IQ score between 84 and 116
A driver randomly selects one of the cars for the first trip of the day. What is the probability that the engine will stall at the first red light the driver encounters?
The original data included values beyond those used to determine the regression equation (5 feet to 15 feet). At a distance of 2 feet, the observed success.
If it's the company's policy to always maintain a constant growth rate in its dividends, what is the current dividend per share?
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