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The average cost for new tires on a vehicle is $157.00. Assuming a normal distribution, if 70 percent of the costs for tires is less than $171.00, what is the standard deviation? The answer is $25.92. How is this find outd?
Statistics and Probability, Statistics
Calculate the standard deviation of a portfolio consisting of 40 percent stock X and 60 percent stock Y. Company Beta Expected Return Variance Covariance X 1.8 0.18 0.30 COVx,y=0.080 Y 2.6 0.22 0.04 Round to the nearest ...
A researcher working at a particular company wants to know if workers' health would improve if they were given extra days 'off. In this company, all workers undergo a standard physical exam twice a year and after each ex ...
A National Center for Health Statistics report based on 1985 data states that 30 percent of American adults smoke. Consider a simple random sample of 17 adults. Find the probability that the number of smokers in the samp ...
A researcher reports that the size of an effect in Population A is d = 0.10 and the effect size in Population B is d = 0.34. Which population is associated with greater power to detect an effect? A) Population A B) Popul ...
Metro trains in Manhattan arrive at your train station exactly every 15 minutes (i.e., the times between arrivals are 15, 15, 15, and 15 in an hour). If you just arrived at the train station at a random time, what is the ...
Suppose metal shafts produced have a standard deviation of 2.8 and a mean diameter of 210 inches. If 84 shafts are sampled at random, what is the probability that the mean diameter of the sample shafts would be less than ...
One-year Treasury bills currently earn 2.25 percent. You expected that one year from now, 1-year Treasury bill rates will increase to 2.75 percent and that two years from now, 1-year Treasury bill rates will increase to ...
A test of the null hypothesis H 0 : μ = μ 0 gives test statistic z = -0.58 (Round your answers to four decimal places.) a) What is the P -value if the alternative is H a : μ > μ 0 ? b) What is the P -value ...
Are the outcomes of hospital care different on weekends than weekdays? In a random sample of 500 patients who experienced severe medical complications after admission to acute care wards in three U.S. states from 1999 an ...
1) Assume that the international average homicide victimization rate is 2.92 (per 100,000). In a sample of 24 industrialized nations, LaFree and Drass (2002) found that the mean homicide victimization rate was 1.49 (per ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As