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The in-control mean of the inside diameter of an 'O' ring is 1.426" and the in-control standard deviation is 0.0010". The inside diameters are normally distributed. (a) What are the control limits of the X chart, if α = 0.0026 and the sample size is 4 ? (b) Find the proportion of rejected 'O' rings when the process is in control, if the tolerance limits are 1.426 ± 0.0015.
Choose the correct answer using sum of squared error (SSE).
Perform a sensitivity analysis on the optimal decision and summarize your findings. In response to which model inputs is the expected profit value most sensitive?
Camera batteries has a standard deviation of 2.1 months. Assume the variance is normally distributed. Do you fell that the lifetimes of the batteries are relatively consistent?
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
Two independent samples of sizes n1 = 50 and n2 = 50 are randomly selected from two populations to test the difference between the population means. The sampling distribution of the sample mean difference, is:
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
In baseball, a "no-hitter" is a regulation 9-inning game in which the pitcher yields no hits to the opposing batters. Chance (Summer, 1994) reported on a study of no-hitters in Major League Baseball (MLB).
where p is the binomial probability of returning a completed survey, and log is the natural logarithm. The multiple logistic regression output from fitting this model is given below.
An elevator has a uniform distribution ranging from 0 to 4 minutes a) find the mean and standard deviation of x, the time a customer on the second floor waits for an elevator.
Suppose that the number of calories in McDonald's Egg McMuffin is normally distributed random variable with mean of 290 calories and standard deviation of 14 calories.
Find the difference between the actual y value and the predicted y value for each individual, square the differences and add the squared values to obtain ss residual.
Explain how much should the airport authority be willing to pay for perfect information about the success of a brand new airport.
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