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A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 27 patients were recorded before administering the drug and after. The mean difference in total cholesterol levels (after - before) was 14.509 mg/dL with a standard deviation of 9.561 mg/dL. When creating a 99% confidence interval for the true average difference in cholesterol levels by the drug, what is the margin of error?
1) 4.5497
2) 5.1129
3) 0.9357
4) 1.84
5) 5.0981
A manager of a large department store with three floors reports that the time a customer on the second floor must wait for an elevator has a uniform distribution ranging from 0 to 16 minutes. It takes the elevator 1 minute to go from floor to floo..
If life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age.
Use the binomial distribution formula to calculate the probability that a) out of 5 adults, none is concerned that employers are monitoring phone calls.
What is the probability that there will be more than three trucks either being loaded or waiting?
Develop 3 regression models to forecast selling price based upon each of other factors individually. Which of these is best?
Using your knowledge of infectious disease epidemiology, quantify the pattern of disease X in this group, i.e., what are the infectivity, pathogenicity, and virulence of disease X?
If garage is robbed, determine the probability doors were left open?
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
In classical hypothesis testing, test statistic is to critical value what the?
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Which of the following is NOT true regarding the normal probability distribution.
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