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Suppose in a study described in problem 9 each patient was also asked if the assigned medication caused any stomach upset. Among 50 patients 12 reported stomach upset with the experimental medication. Construct a 90% CI for the proportion of patients who experience stomach upset with the experimental medication. ( Problem 9 is a crossover trial. total of 50 patients are enrolled. the mean difference in times between the experiment is -9.4 minutes with a standard deviation of 2.8 minutes)
a. Construct a 90% CI for the proportion of patients who experience stomach upset with the experimental medication.
A certain brand of automobile tire has a mean span of 3500 miles and a standard deviation of 2000 miles. (assume the life spans of the tires have a bell-shaped distribution)
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
A consumer purchases 12 frozen chickens. What is the probability that the consumer will have more than 6 contaminated chickens.
Jon Molnar will graduate from Carolina Forest High School this year. He took the American College Test (ACT) for college admission and received a score of 30.
The U.S. Department of Transportation defines an airline flight as being "on-time" if it landed less than 15 minutes after the scheduled time shown in the carrier's Computerized Reservation System.
If statistically significant, do you think the difference is large enough to be important?
The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percentage of bolts will have a diameter greater than 0.32 inches?
What additional strategies (up to 3) you would propose that may increase validity of the findings.
SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank..
Compose a 350 to 700-word summary report of your findings to the researcher and owner of the restaurant in which you Identify evidence, if any, of the researcher's claim. Perform a one- or two-tail test on the data provided,
A sample of 25 their average life from the time they are fully charges to the time they are fully discharged is 170 minutes the sample standard deviation is 30 minutes. Test the claim that battery will last for three hours.
Do you think an F-ratio of 1 would lead you to conclude that there is no treatment effect? Why? Justify your answers with examples.
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