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A machine is set to fill 20-ounce plastic bottles with an average of 21 ounces of Mountain Dew. Suppose
the amounts dispensed are normally distributed with a standard deviation of .5 ounce.
(a) Determine what percentage of plastic bottles will contain more than 20 ounces.
(b) Determine what percentage of plastic bottles will contain less than 19.5 ounces.
(c) Now suppose the standard deviation is 1.5 ounces. Determine the average number of ounces the machine should dispense so that no more than 2.5% of the bottles contain less than 19.5 ounces.
suppose you just received a shipment of thirteen televisions. three of the televisions are defective. if two
In a study of 10 graduate students from a nurse education program, the average age of the group was 48.6 years and the standard deviation was 4.1 years. Assume the variable is normally distributed. Find the 95% confidence interval of the true mean..
What is the actual formula for finding the exact probability from the z-score without having to use the table?
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 3.7 lb of the population mean.
the driving distance for the top 100 golfers on the pga touris between 284.7 and 310.6 yards. assume that the driving
Union Membership Nationwide 13.7% of employed wage and salary workers are union members (down from 20.1% in 1983). A random sample of 300 local wage and salary workers showed that 50 belonged to a union.
The following survey questions have been established for a medical errors and patient safety business research paper:
Compute a value V that enables us to state, with 90 percent confidence, that population variance (sigma^2) is less than V.
Use the study to estimate the risk of an air bag fatality on a child seated on the front passenger seat.
At the .05 significance level, can Macaray conclude that the population means are different? Note that you should show all 5 steps in the test of hypothesis.
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