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A study of fill volumes is conducted at a food canning factory to determine the level of consistency between the two filling lines, A and B. A random sample of 11 cans taken from line A has a sample average of 8.005 ounces and a sample standard deviation of 0.013 ounces. A similar sample of 16 cans is obtained from line B with a sample average of 7.997 ounces and a sample standard deviation of 0.008 ounces. The quality control manager is interested in finding evidence that there is a difference in the variance in fill volume for the two lines.
1. Give the value of the test statistic suggested by the testing situation described above.
2. Which of the following correctly describes the p-value for the test statistic in #1?
3. What critical value(s) would be used at the .05 significance level?
4. What is the decision at the .05 significance level?
5. Considering the test conducted in #1-4, if you were to construct a 95% confidence interval for the ratio of the two variances, which of the following would you expect to be true concerning the two values describing the interval?
At.02 significance level is it sensible to conclude that mean number of shoes sold at mall stores is larger than at outlet stores?
a company wants to check the consistency of electronic copies of signatures for consumer credit purchases. a sample of
you start with scatterplots and correlation before regression; scatterplots need to be much more refined to be of use; so, you have a relationship - how much of the variation does the model explain and what are the practical conclusions?
An airline estimates that 90% of people booked on their flights actually show up. If the airline books 71 peopleon a flight for which the maximum number is 69, what is the probability that the number of people who show up will exceed the capacity ..
This is one way of saying statistics can be easily miscommunicated. Find one example of how statistics are miscommunicated and explain why there was a miscommunication and what you would do to correct this problem.Using probability: How can you use..
The actual proportion of doctors is less than 90%, a random sample of 100 doctors resulted in 85 who recommended brand Z. The test statistic is approximately?
a distribution center receives shipments of a product from three different factories in the quantities of 6040 and 20.
When the level of confidence and sample size remain the same, a confidence interval for a population proportion π will be __________ when p(1-p) is larger than when p(1-p) is smaller.
What measurements assesses the amount of variance of change in the dependent variable reflected by changes in the independent variable?
Describe the types of probability -example of classical probability, empirical probability, or subjective probability.
answer the followinga- if the correlation coefficient is -0.15 what is the sign of the slope of the regression line?b-
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
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