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You are the manager of a restaurant that delivers pizza to college dorm rooms. You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 25 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 22.4 minutes and a sample standard deviation of 6 minutes.
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes?
At the 0.05 level of significance , use the five step p-value approach and interpret the meaning of the p-value.
Compare your conclusions in part 1 and 2
How many Corolla buyers must be surveyed if we want to be 95% confident that the sample percentage is within four percentage points of the true percent all Corolla buyers?
Determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
suppose you are told that a 95 confidence interval for the average price of a gallon of regular gasoline in your state
how can you do a regression analysis on excel to predict your sales for the next 5
A researcher reports a mean pulse rate of 80 for the ampled patients. the data also revealed a standard deviation of 10.5. what percent of patients pulse rates will fall between 69.5 ans 90.5?
Assume that there is a 0.15 probability that a basketball playoff series will last four games, a 0.30 probability that it will last five games. Is it unusual for a team to win a series in 5 games?
if the random q has a continuous uniform distribution with parameters a0 and b3 find the probability that the roots of
1. many television viewers express doubts about the validity of certain commercials. in an attempt to answer their
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Formulate a linear programming model for this problem.
Craft one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following:
containers arrive at a stocking station on a conveyor at the rate of five per minute. container weight is 25 kg.
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