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The average gas mileage of a certain model car is 30 miles per gallon. If the gas mileages are normally distributed with a standard deviation of 2.1, find the probability that a car has a gas mileage of between 29.2 and 30.3 miles per gallon.
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.
Determine mean of distribution shown. Give the mean of following probability distribution?
Is there evidence of a significant difference in the variance of the access read times for the three file sizes? Test at the 95% confidence level.
Compute a 99% confidence interval for the true average number of months taken by bankruptcy petitioners to acquire debts listed on their petitions.
In a random sample of 80 items, the defect rate is 5% but the manager claims that this is only a sample fluctuation and production is not really out of control. At the 0.01 level of significance, does the data provide sufficient evidence that the ..
Search the Internet to find three applications of statistical concepts that you find interesting, that you encounter on a daily basis, or that you find in your profession.
One table has a standard deviation of $50 while the other has a standard deviation of $150. What conclusion can be drawn from the data?
If you were to accept the null hypothesis, even though the null hypothesis was false, what type of error would you have commited?
Simplify the principal square root of 64 z^4. Assume that z represents a positive real number.
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
What step-by-step methods might make this material easier to learn and internalize? Are the formulas really as terrifying as they might first appear?
Using the .10 level of significance, can we conclude there is a significant difference in the proportion of adults and the proportion of teens who rated the new video?
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