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People with spinal cord injuries may lose function in some, but not all, of their muscles. The ability to push oneself up is particularly important for shifting position when seated and for transferring into and out of wheelchairs. Surgeons compared two operations to restore the ability to push up in children. Two years after surgery, scores rating pushing strength for 16 arms that had been operated on had a distribution displayed here with a histogram and boxplot. (Mulcahey, M. J., Lutz, Cheryl, Kozen, Scott, Betz, Randel, "Prospective Evaluation of Biceps to Triceps and Deltoid to Triceps for Elbow Extension in Tetraplegia," Journal of Hand Surgery, 28, 6, 2003)
a) Describe the shape of this distribution.
b) What is the median of the distribution?
c) What is the range of the strength scores?
A hardware retailer has average sales of $64,235 with a standard deviation of $5,918 for a 12-month period. The mean monthly sales for all retailers in the chain are $59,844. Is this hardware retailer's sales significantly different from all retai..
The traveling salesperson randomly selects 5 apartments in your building to visit. What is the probability that she visits both you and your neighbor bill?
The first letter is not a vowel and the second and third letters selected are vowels.
A group of 12 patients are given the medicine. If the claim is true, what is the probability that 8 have relief within a few minutes?
1 give the equation for the standard deviation of a random variable x over an entire population with probability mass
Is there evidence that the change was successful in reducing the wait time? (use 0.05 level of significance)
Q1. One of the critical factors that determine the success of a catalogue store chain is the availability of products that customers want to buy. If a store is sold out, future sales to that customer are less likely. Because of this, stores are re..
If researcher obtains sample mean of M = 88, which combination of factors is most likely to result in rejecting null hypothesis?
a prize is hidden at random behind one of three doors. if you pick the correct door you get the prize that is behind
discuss the concept of sampling distributions and describe the rationale for their use in making inferences about
For a given confidence interval, what is the interpretation of a 96% confidence level?
What events occurred in these months that may have caused such an extreme performance in the stock's return and describe and analyze the monthly returns using Stata's statistical and graphics capabilities.
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