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A transportation company operates 200 trucks and would like to use a hidden speed monitor device to record the maximum speed at which a truck is operated during the period that the device is installed.
The trucks are driven primarily on interstate highways, and the company wants to estimate the average maximum speed for its fleet with 90% confidence and within 2 miles per hour. Using (and explaining) your own estimate for the population standard deviation, determine the number of trucks on which the company should install the hidden speed-recording device.
A student randomly guesses on all 25 questions of a true-false test. Use the normal approximation to the binomial to approximate Pr[ ], that is, that the student gets 10 or fewer questions correct.
what statement should be made about the null and alternative hypothesis based on sample data and significance level?
according to a survey 90 of senior executives at major u.s corporations felt that the federal budget will not be
the number of yearly breakdowns for the power generator observed over the past 20 years at orlando utilities is
the number of calories in a 12-ounce serving of randomly-selected regular budweiser and miller lite beers is listed. is
Calculate the sample proportion of respondents who have a college degree. What is the probability of getting a sample proportion as extreme or more extreme than the one observed in part a if the population has 40% with college degrees?
Construct a frequency distribution with class intervals of 3, starting with the lowest class limit being 28.
Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24 and recalculate the confidence interval.
Suppose a user of the multilevel QPSK system needs to decode only the third bit k of the message ijk. For k = 0, 1, let Hk denote the hypothesis that the third bit was k. What are the acceptance sets A0 and A1? What is P[B3], the probability that ..
The p-value approach was to be used. A sample of size 49 gave a sample mean of 508. Given that σ = 30.2, and α = 0.01, find the p-value, and write your conclusion.
Children per family for certain community from census data. Recognize random variable of interest, find out whether is a discrete or continuos, and write its possible values.
a toll bridge charges 1.00 for a passenger car and 2.50 for other vehicles. experience suggests that 60 of vehicles
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