Standard hotel rooms in the philadelphia
A random sample of 55 standard hotel rooms in the Philadelphia, PA area has a mean nightly cost of $154.17 and a standard deviation of $38.60. Construct a 99% confidence interval for the population mean. Interpret the results.
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Your favorite physics book (total mass 2.4kg) is pushed across the floor at a constant speed by a force of F=26N at an angle of -42 degrees (aiming downward 42 degrees below the horizontal).
A new radar device is being considered for a certain defense missile system. The system is checked by experimenting with actual aircraft in which a kill or a no kill is simulated.
Based on your study of z-scores, explain the three uses of z-scores. How might they each relate to Eric's trip between home and work? What is the relationship between z-scores and the standard normal curve?
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In a survey of 891 US adults who follow baseball in a recent year, 184 said that the Boston Red Sox would win the World Series. Construct a 90% confidence interval for the population proportion of US adults who follow baseball as stated above.
A researcher wishes to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows that 40% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proport
A copy machine dealer has data on the number x of copy machines at each of 89 customer locations and the number y of service calls in a month at each location. Summary calculations give x? = 804, sx = 2.1, ? = 14.2, sy = 3.8, and r = 0.86 What is
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