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A soft drink-dispensing machine uses paper cups that hold a maximum of 12 ounces. The machine is set to dispense a mean of 10 ounces of the drink. Because of an imprecise process, the amount dispensed actually varies; it is normally distributed with a standard deviation of 1 ounce. If we simulated the filling process, and had the random number .564, how many ounces would the cup contain?
Using the sign test, if (1) H1 is directional, (2) H0 is false, (3) a = 0.01, and (4) N = 12, then the probability of making a Type I error equals
What is the probability a random sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 502 on the Critical Reading part of the test (to 4 decimals)?
Calculate the test statistic. Determine the p-value of the test-statistic.
Each machine is up during a cycle time with probability 0.9 and down with probability .1. Machines are up or down independently from each other.
A study of 600 college students taking Statistics 101 revealed that 54 students received the grade of A. Typically 10% of the class gets an A. The difference between this group of students and the expected value is not significant at the 0.05 leve..
Customer satisfaction A department store mails a customer satisfaction survey to people who make credit card purchases at the store.
In the Willow Brook National Bank waiting line system (see Problem 1), assume that the service times for the drive-up teller follow an exponential probability distribution with a service rate of 36 customers per hour or 0.6 customer per minute.
The effect of an outlier. Refer to Exercise 4.41. Add a ninth student whose scores on the second test and final exam would lead
Using the .05 level, do the results support the researcher's theory? (a) Use the steps of hypothesis testing, (b) sketch the distributions involved.
A consumer group is testing the gas mileage of three different models of cars. Several cars of each model were driven 500 miles and the mileage was recorded as follows.
Test whether the mean weight is less than 10 pounds. Use P-value approach.
a student took two national aptitude tests. the national average and standard deviation were 675 and 150 respectively
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