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Suppose 240 people are being tested for a disease (with a 100% accurate test). Each individual has a 7% probability of having the disease, (independent of whether any of the other individuals in the group have the disease). Rather than testing each blood sample separately, the administrators will randomly mix/combine k blood samples together for testing (k = 1,2,3,4,5,6). k = the number of individuals in a group. If the test gives a negative result, then NONE of the k people in that subgroup have to be retested, but if that groups test comes out positive, then everyone in that group must be tested individually. What value of k will give the lowest expected number of tests that have to be performed? what is the expected number of tests?
a genetic experiment involving peas yielded one sample of offspring consisting of 426 green peas and 145 yellow peas.
in the world series of baseball two teams a and b play a sequence of games against each other and the first team that
In fitting the simple linear regression model Yi ~ N (α + β xi, σ 2 ) to the following data:
Prepare a report with your rankings of the judges. Also include an analysis of the likelihood of appeal and case reversal in the three courts. At a minimum, your report should include the probability of cases being appealed and reversed in the thre..
How many packages should be sampled in order to be 90% confident of being within 0.9% of the actual population percentage of packages delivered damaged.
a study of cell phones and the risk of brain cancer looked at a group of 469 people who have brain cancer. the
a consulting firm submitted a bid for a large research project. the firms management initially felt they had a 50-50
the probability that sammy makes his own lunch is 0.75. the probability increases to 0.8 if he made his own lunch the
which of the following correlation coefficients represents the variables with the weakest degree of
The value of the standardized test statistic
Suppose that a random sample of 200 adults found that 110 thought there is too much violence on television. Is this enough evidence to reject the claim? What do we want to know?
In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
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