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The empirical rule states that approximately 95% of data from a normal distribution with a mean of 0 and a standard deviation of 1 will have an absolute value less than 2.
Use the mean and r norm functions to find the proportion of 1000 random normal variables whose absolute values are less than 2.
Repeat several times and see how widely the results vary. Try sample size 10000 to see if the variation does become smaller.
a confidence interval is desired for the true average stray-load loss u watts for a certain type of induction motor
the length of time in minutes that you have to wait in line at your bank is a random variable with a continuous uniform
They have collected data on gender, shoe size, and height to see if they can change their business model to include only one size of shoes regardless height or gender of the wearer.
let x and y be independent exponential random variables with means 2 and 3 respectively. let zxy. determine
Using the p- value approach, test the hypotheses at the 5% level of significance.
question the u.s. energy information administration releases figures in their publication monthly energy review about
Suppose that nX = 42 imported and nY = 50 domestic cars are sampled and their average miles per gallon are 23.5 and 20.1, respectively. Find a 99% confidence interval for the difference µX - µY .
there are many consulting organizations that predict whether increases in stock prices will be unusually low unusually
a) Define the decision variables? How many decision variables are there in total? b) What is the objective function? c) What are the constraints including the sign and type restrictions?
Share 1 real-world binomial distribution situation and 1 real-world Poisson distribution situation. Be sure to explain why each example is defined as binomial or Poisson.
What is the probability of a gambler winning if he bets on a red number showing up?- Specify the probability mass function of the random variable.
McCormick et al. (1972) give a ranking, on the scale of 0 to 2, of the degree (subjectively determined) to which each of a total of 53 military aircraft can perform one or more of a total of 27 functions. This yields the following object/attribute..
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