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A population consists of 15 items, 10 of which are acceptable. In a sample of 4 items, what is the probability that exactly 3 are acceptable? Assume the samples are drawn without replacement.
Compute the two groups using Paired sample t-test. Compute which modification reduced the number of traffic accidents
A portfolio p of consisting 60% of stock X and 40% of stock Y, has a correlation ρpM = 0.62 with the market. What is the portfolio volatility? Statement on the diversification effect.
The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
Determine a 99% confidence interval for mean pH in rainfall. How would you distinguish interval?
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
A large internet retailer is studying the lead time (elapsed time between the time when the order is placed and the time it is filed). The table below gives the lead times (in days) for a random sample of recent orders.
An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. At the end of the semester, she has the following grades.
Suppose the investor is to invest a total of $10,000, what is the expected value of perfect information for investor.
Of the adults in Jefferson County, 10% have had CPR training
If we know that 20 people will attend, what price should be charged per person to break even?
Given the EOQ, what is the average inventory? What is the annual inventory holding cost and in minimizing cost, how many orders would be made each year? What would be the annual ordering cost
If 25 men aged 18-24 are arbitrarily chosen, determine probability that their mean serum cholesterol level is between 165 and 200.
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