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Too Fast a Location? - At a particular location along a highway, a state official from the Department of Transportation in an unmarked car records the speed for each of a random sample of 36 cars. The resulting sample mean speed was 68.3 miles per hour (mph) and the standard error of the sample mean was 1.18 mph.
A. What is the value of the standard deviation for these 36 speeds?
B.Provide a 95% confidence interval to estimate the population mean car speed (for all such cars traveling along that part of the highway).
C. It is assumed that the sample of cars is randomly selected (representative). Even though the histogram and qq plot of the 36 car speeds are found to show evidence that the population of speeds at that location may not be normally distributed, can the resulting confidence interval be considered valid?
at its closest point, mars is 128.5 million miles from the sun. at its farthest point, mars is 155.0 million miles from the sun. write an equation for the orbit of mars. assume that the center of the orbit is the origin, the sun lies on the x-axis..
A computer store has 50 printers of which 30 are laser printers and 20 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.
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When a student is taught how to find the mean of a set of data, why might the child have a difficult time accepting the answer? Please explain in details and give example.
worth, missouri is 25 miles more north of independence, missouri than it is west of putnam, missouri. The distance between independence and putnam is approximately 120 miles. Find the distance between putnam and worth and the distance between wort..
Use the Poisson Distribution to find the indicated probability.
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