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The auto parts department of an automotive dealership sends out an average of 8 special orders daily. The number of special orders is assumed to follow a Poisson distribution.
a) What is the probability that for any day, the number of special orders sent out will be more than 4?
b) What is the standard deviation of the number of special orders sent out daily?
The Manager of a seafood restaurant was asked to establish a pricing policy on lobster dinners. Experimenting with prices produced the following data:
There is enough evidence at a significance level of 10%, to conclude that the content average sodium this brand of corn flakes is 130 milligrams?
Crystal Ball requires the following steps:
Compute the probability for the given frequency distribution.
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
Probability values based on normal distribution - What can you say about the shape of the distribution of sample mean and find the standard error of the distribution of the sample mean?
What is the p-value and compute a 95% CI for the difference in means between the two groups?
Hypothesis testing of single mean - can we conclude that the mean weight is greater than 16 ounces? Determine the p -value.
We assume that the population is approximately normally distributed. Find the confidence interval: for a confidence level of 95%:
a) Find the 95% confidence interval for the population mean based on the 37 patients who remain after you drop the outlier. b) Compare your interval in (a) with your interval from Exercise 18.32. What is the most important effect of removing the ou..
A survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
A clinical trial was conducted comparing a new compound designed to improve wound healing in trauma patients to a placebo. After treatment for 5 days, 58% of the patients taking the new compound had a substantial reduction in the size of their wou..
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