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A packaging company that bottles soda in 12 oz. bottles is interested in monitoring the machines to ensure quality control. Over the years, it has been determined that the machines has a natural standard deviation of 0.49 oz. and the distribution of volumes is normally distributed. A quality control manager takes a random sample of 40 sodas with a sample mean of 12.3 oz. At the 5% level of significance, test the following hypotheses:
1) Perform a one-tail hypothesis, testing the claim that the true mean is 12 as opposed to the machine overfilling the bottles
2) Perform a two-tail hypothesis, testing the claim that the true mean is 12 versus the alternative that the machine is off, either way
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
What is the probability that the sample mean will be greater than M = 510. In symbols, what is p (M>510)?
Standard deviation of 5. suppose 100 golfers played the course today. Find the probability that the average score of the 100 golfers exceeded 74.
A test result x
A sample of 23 European countries found that the variance of life expectancy was 7.3 years. What is the 95% confidence interval estimate for the variance of life expectancy in Europe?
Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
a student received an a on the first test of the semester. the student wants to calculate the probability of scoring an
a key aspect to applying an x and r-chart model to a variable quality measure is the concept of chance and assignable
Analysis of variance (ANOVA) is used to determine if there is a difference between the means of different populations. This is an example from a student in Prescott Arizona.
A Tire company has developed a new type of tire. Extensive testing shows that the number of miles the new tire will run before wearing out is normally distrubuted with a mean of 40,000 miles and a standard deviation of 4,000 miles
question in the u.s. it is estimated that an average person makes 4 visits a year to doctors offices.a what is the mean
When we carry out a chi-square test of independence, the expected frequencies are based upon the Null hypothesis - true or false.
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