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The level of nitrogen oxides (NOX) in the exhaust of cars of a particular model varies Normally with mean 0.24 grams per mile (g/mi) and standard deviation 0.07 g/mi. Government regulations call for NOX emissions no higher than 0.3 g/mi.
(a) What is the probability that a single car of this model fails to meet the NOX requirement? (Use 3 decimal places)
(b) A company has 25 cars of this model in its fleet. What is the probability that the average NOX level of these cars is above the 0.3 g/mi limit? (Use 3 decimal places)
(c) What average NOX level for the fleet is less than 0.01 of all other average NOX levels? Hint: this requires a backward Normal calculation. (Use 2 decimal places)
jeff bollinger of prudential realtors has 20 residential listings under contract. the following table shows the number
a manufacturer of disk drives for notebook computers wants a mtbf of at least 50000 hours. recent test results for 15
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A student drilled a hole in a die, loaded it with lead weight, and then rolled the die 200 times. The observed frequencies for the outcomes of 1, 2, 3, 4, 5, and 6 are respectively 27, 31, 42, 40, 28, and 32. Would you be able to conduct a goo..
Research by the Illinois Banking Company revealed that only 10 percent of their customers wait more than five minutes to do their banking. Management considers this reasonable and will not add more tellers unless the proportion becomes larger than..
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confidence interval estimate for the meandata nbspsample standard deviationnbsp1.9667sample meannbsp 20.73sample
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
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The following data represent scores of 50 students in the applied business statistics test. Prepare the frequency distribution table and the frequency histogram for this data set.
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