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You're in charge of an experiment to evaluate a treatment which is advertised as being 90% effective at killing a particular insect. You plan an experiment in which the treatment is tested on 200 insects.
a. If the advertising is accurate, what is the expected value and standard deviation of the number of insects that ought to be killed in this experiment?
b. If the experiment resulted in 173 insects (of the 200) being killed by the treatment, would you be suspicious of the advertising claim? Explain briefly (a sentence or two at most) why or why not.
Following data from an x bar chart, is the process capable (capability index>1.33)?
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
By using the normal distribution to approximate the desired probability.
If person is selected at random and tested, determine the probability of that person having an IQ score between 85 and 115. Make use of EXCEL to help determine the probability.
Complete the test at the 5% level of significance.
Where does the p-value come from for the spatial scan statistic used in SaTScan? Explain how Monte Carlo simulation is used to derive a p-value for a cluster.
A sample of ten ER patients was conducted to determine their average wait time and to compare this to the target wait time. The hospital wants to make sure that patients do not wait more than 35 minutes. Test following hypotheses using a 95% con..
Compute the range, variance, standard deviation, and coefficient of variation. Compute the Z scores. Are there any outliers?
We wish to create this mean value interval for selling price with 95% confidence level. Find out the best point estimate (average) for selling price. Critical t-value(s) associated with 95% confidence level.
Draw a scatterplot indicating a strong negative relationship between the variables pf income and mental illness. Be sure to label the axes correctly.
Determine the estimated population mean?
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
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