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For the car speed data of given Exercise, here is the histogram, boxplot, and Normal probability plot of the 100 readings. Do you think it is appropriate to apply a Normal model here? Explain.
Exercise :Car speeds. John Beale of Stanford, CA, recorded the speeds of cars driving past his house, where the speed limit read 20 mph. The mean of 100 readings was 23.84 mph, with a standard deviation of 3.56 mph. (He actually recorded every car for a two-month period. These are 100 representative readings.)
a) How many standard deviations from the mean would a car going under the speed limit be?
b) Which would be more unusual, a car traveling 34 mph or one going 10 mph?
find the probability of throwing a sum of 11 at least 3 times in 11 throws of a pair of fair
percentage of persons completing 4 years of college23 26 30 34 26 25 23 22 31 2224 38 33 27 27 34 24 24 24 2122 24 28
1.a newspaper conducted a statewide survey concerning the 2000 race for state senator. the newspaper took a random
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The marks on a statistics midterm test are normally distributed with a mean of 78 and a standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is more than 75?
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1.the st. paul pioneer press has assigned its one remaining reporter to write an article about gasoline prices in the
When a strain gauge is stretched under uniaxial tension, its resistance varies with the imposed strain. A resistance bridge circuit is used to convert the resistance change into a voltage.
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