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Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw score in a sample into a z-score to determine how many standard deviations the raw score represents. Since his "score" is 21, you would subtract the mean of 17 from 21 and divide that result (4) by the standard deviation of 3. The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean. Is the z value positive or negative? Explain why it should be positive or negative. Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative. On a different day, it took Eric 17 minutes to get from home to work. What is the z value? Why should you expect this result even before you did the calculation? Please explain the following four uses of z-scores, including how each relates to Eric’s trip between home and work: Interpret raw scores Compare different variables Compute relative frequency Describe sample means What is the relationship between z-scores and the standard normal curve?
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Steam enters the nozzle of a turbine with a low velocity at 3 MPa, 350°C, and leaves the nozzle at 1.6 MPa at a velocity of 550 m/s. The rate of flow of steam is 0.5 kg/s. Calculate the quality or temperature of the steam leaving the nozzle and the e..
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Create a table comparing a regular corporation, an S-corporation, and a limited-liability company on these dimensions: limited-liability protection, double taxation, restrictions on the number of stockholders or members, rules, and restrictions. If y..
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