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Question: Contaminated chicken. In January 2007 Consumer Reports published their study of bacterial contamination of chicken sold in the United States. They purchased 525 broiler chickens from various kinds of food stores in 23 states and tested them for types of bacteria that cause food-borne illnesses. Laboratory results indicated that 83% of these chickens were infected with Campylobacter.
a) Construct a 95% confidence interval.
b) Explain what your confidence interval says about chicken sold in the United States.
c) A spokesperson for the U.S. Department of Agriculture dismissed the Consumer Reports finding, saying, "That's 500 samples out of 9 billion chickens slaughtered a year. With the small numbers they [tested], I don't know that one would want to change one's buying habits." Is this criticism valid? Explain.
For a sample with a mean of M =51, a score of X =59 corresponds to z = 2.00. What is the sample standard deviation?
let fxyxy 45x3ye-x-2y if xgt0 ygt0 be the joint distributiton of xy. find the correlation
At the 0.05 level, is import/domestic ownership independent of magazine preference?- Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
Let f be a convex function defined on a convex set A ⊂ Rk. For some fixed x and y in Rk let g(t ) := f (x + ty) + f (x - ty) whenever this is defined. Show that g is a nondecreasing function defined on an interval (possibly empty) in R.
greg stock is attempting to monitor a filling process that has an overall average of 705 cc. the averange range is 6
1. a 2004 survey of randomly sampled utah residents found that 10.5 0.105 of them smoked regularly.a suppose you survey
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An aircraft has dual hydraulic systems. The aircraft switches to the standby system automatically if the frrst system fails.
1. a sample survey of 54 discount brokers showed that the mean price charged for a trade of 100 shares at 50 per share
In the formaldehyde molecule, H2CO, a double bond exists between the carbon and oxygen atoms. (a) What type of hybridization is involved? (b) The molecule is found to be planar; one bond between the C and O atoms is a σ bond, and the other is a π ..
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?
Why is cohort studies more expensive than case-control studies? I know one problem is cohort studies often must be followed up for a long period to determine whether the outcome of interest has developed and they are more expense than case-control..
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