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A recent Channel 7 News story claims that the city municipal transportation authority pays too much for routine automobile maintenance of their vehicle fleet. The average (mean) amount paid by the unit is $104.15 with a standard deviation of $9.71 (normal distribution). As an initial step, the department head decides to investigate the most expensive 25% of the routine maintenance bills. According to the criteria above, what dollar amount should bills be investigated?
for quality control purposes a company that manufactures copper sheets routinely takes samples from its production
the positioning of nests in shrubs was noted for a species of bird. use the data shown to determine if there was a
use the sample data and confidence level to construct the confidence interval estimate of the population proportion p.
a. Did the sample of Valproate-takers have a lower percentage engaging in heavy drinking?
The standard for this material requires that impact strength must be greater than 1.0ft-lb/in. The sample average and standard deviation obtained were 1.25 and 0.25 respectively.
In the regression equation: y=0.35*x+15, where x takes some values in the range [5,15], what is the predicted value if x=10? Can this equation be used
Find the expected value of Y when x = 150, E(Y | 150).- How much change in the dependent variable is expected when x increases by one unit? Justify your answer.
Modify the make-account procedure so that it creates password-protected accounts. That is, make-account should take a symbol as an additional argument, as in (define acc (make-account 100 'secret-password
In a shipment of 59 vials, only 18 does not have hairline cracks. 6 vials are randomly selected from the shipment. Find the probability that at least one of the 6 selected vials has a hairline crack.
The overall average for the samples is 17 ounces. The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
If 280 different coins are inserted into the vending machine, what is the probability that the mean falls between the limits of 5.553 g and 5.773 g? The probability is approximately nothing . (Round to four decimal places as needed.)
According to the National Health Center, the heights of 6-year-old girls are Normally distributed with a mean of 45 inches and standard deviation of 2 inches.
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