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Question: Carpal tunnel. The painful wrist condition called carpal tunnel syndrome can be treated with surgery or less invasive wrist splints. In September 2002, Time magazine reported on a study of 176 patients. Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved.
a) What's the standard error of the difference in the two proportions?
b) Construct a 95% confidence interval for this difference.
c) State an appropriate conclusion.
Otto is trying out for the javelin throw to compete in the Olympics. The lengths of his javelin throws are normally distributed with a mean of 310 feet and a standard deviation of 13 feet. What is the probability that the total length of three of ..
an official from the downtown development authority claims that the percentage of local businesses that have had some
do children less than a year old recognize the difference between naughty and nice and show show a preference for nice
The manager of a convenience store tracked total sales during a small sample of eight recent daytime shifts (an eight-hour period of the day). The total sales during these periods were as follows:
The mean acetaminophen content for a random sample of n = 41 tablets is603.3 mg. Assume that the population standard deviation is 4.9 mg.
Construct and show a scatterplot of the data. Does it show a positive correlation, negative correlation or no correlation?
Daily output of Marathon's Garyville, Lousiana, refinery is normally distributed with a mean of 232,000 barrels of crude oil per day with a standard deviation.
lori m. is trying to determine the proportion of expense reports that contain questionable charges. she takes a
In a sample of 10 workers, what is the probability that exactly three workers take the public transport daily? [Hint: It is a Binomial Distribution Problem.]
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles.
a randomized trial is conducted to evaluate the efficacy of a new cholesterol lowering medication. the primary
The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
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