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Microfracture knee surgery has a 75% chance of success on patients with degenerative knees. The surgery is performed on 5 patients. Find the probability of the surgery being successful on less than 3.
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
Does this result support original claim, or is population percentage considerably less than 45%. Use alpha=.05 for level of significance.
Colleges typically use grade point average cutoffs to decide who graduates with honors and who is accepted into certain programs (such as teacher education, for example).
Selection of a location for a prospective Wal-Mart creates many questions for executives. A suitable site would be one that has an adequate demand for Wal-Mart offerings, sufficient transportation resources, and an available labor force.
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 121. Assume the variable x is normally distributed.
Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. Use a =.05 and .01 and perform a goodness of fit test.
A record executive is interested in the popularity of her label's newest band, The Standard Deviations. She asks 10 people how many Standard Deviations songs they know.
If we assume that the errors made by rounding off are iid and have a uniform distribution over the interval ( - ~, ~), compute approximately the probability that the sum of the integers is within two units of the true sum.
Based on these data, what is the probability that next Christmas will be dry and based on the data,what is the probability that next Christmas will be rainy or cloudy and dry?
Construct a frequency distribution and construct a histogram for the following data and use seven intervals, starting with 30-39.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
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