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Suppose a random smaple of size 36 is drawn from a population with a mean of 278,. If 86% of the time the sample mean is less than 280, what is the population standard deviation?
Statistics and Probability, Statistics
Can someone explain this to me? Or draw it out so that I can understand. You may see a problem like the following: a mean score of 20 and SD of 3, and asked what percentage of cases will be between 17 and 23, you would r ...
A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 30. (a) How large must n be if the length of the 95% CI ...
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The height of 5th grade boys is normally distributed with mean μ=57 inches and standard deviation σ=2 inches. What is the probability that the height of a randomly selected 5th grade boy will be between 53 inches and 61 ...
SHOW YOUR WORK AND SOLUTIONS What is the NPV of a project that costs $15,000 and returns $25,000 annually for three years if the opportunity cost of capital is 14%?
You are working with a MOE of +/-4% and a confidence level of 95%. P and Q =.50, and your CPI is $25.00. The company you work for needs to make a decision as to whether they may need different advertising for men and wom ...
1. Out-of-state tuition and fees at the top graduate schools of business can be very expensive, but the starting salary and bonus paid to graduates from many of these schools can be substantial. The following data show t ...
Let X be the random variable that represents the life in hours of a certain electronic device. The probability density function of X X is f(x)=360x 3 f(x)=360x3 , 10≤x≤15 10≤x≤15. Find the expected life of this device.
According to the Polk Company, a survey of households using the Internet in buying or leasing cars reported that 81% were seeking information about prices. In addition, 44% were seeking information about products offered ...
A process is normally distributed with a mean of 104 rotations per minute and a standard deviation of 8.2 rotations per minute. If a randomly selected minute has 128 rotations per minute, would the process be considered ...
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