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The grades on the midterm given in a large managerial stats class are normally distibuted with mean 75 and standard deviation 9. Instructors of this class wants to assign an A to top 10%, B to the next 10%, C to next 10%, D to next 10%, and an F to all scores below the 60th percentile. Find the lowest acceptable score within each established range. For example, the lowest acceptable score for an A is the score at the 90th percentile.
Please help me with the attached pre-calculus questions. Use mathematical induction to prove that 6 is a factor of n (n + 1)(n + 2).
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
Assume that the height of adult caucasian women have a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 women are randomly selected find the probability that they have a mean height greater that 63.0 inches.
Using data on average school grade for first use. Use the t test to conduct a one-tailed test of the null hypothesis, assuming that the average grade is higher for males than for females
What is the probability that at least one of the 40 shuttle missions scheduled over the next 5 years results in a critical-item failure?
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
A discussion of extreme weather reports that: "In most states, hurricanes occur infrequently. Yet, when a hurricane hits, the losses can be catastrophic.
A side effect of a certain anesthetic used in surgery is the hiccups, which occurs in about 10 percent of the cases. If three patients are scheduled for surgery today and are to be administered this anesthetic, compute the probability that:
Identify the population and the sample: A survey of 787 small-business managers found that 72% are optimistic about the future of their company.
The 587th of the 731 trees in the preserve was selected as the first observation in the sample. What is the tree number of the second observation in the sample?
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