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The specifications on an electronic component in a target acquisition system are that its life must be between 5,000 - 10,000 h. The life is normally distributed with mean 7500 h. The manufacturer realizes a price of $10 per unit produced; however defective units must be replaced at a cost of $5 to the manufacturer.
Two different manufacturing processes can be used, both of which have the same mean life. However the standard deviation of life for process 1 is 1000 h, where as process 2 is only 500 h. Production costs for process 2 are twice those for process 1. What value of production cost will determine the selection between processes 1 and 2?
For a population with a mean of μ = 50 and a standard deviation of σ = 10, how much error, on average, would you expect between the sample mean (M) and population mean for:
find the P-value associated with each of the given below values of the test statistic. (Give the answers to four decimal places.) (a) z = 1.20
a sample of 200 elements from a population with a known standard deviation is selected. for an interval estimation of m
Compute average daily rainfall in the week and for weekends. Get the average of weekdays' rainfalls and average of weekend's rainfalls.
q1. in testing the difference between two population means using two independent samples we use thepooled variance in
The supplier agrees they will deliver on the day the order is placed. Note that the basic unit of measurement for a period is one year in this case.
At the Statsville County Fair, the probability of winning a prize in the ring-toss game is 0.1. Show the probability distribution for the number of prizes won in 8 games.
a coal company wants to determine a 95 confidence interval estimate for the average daily tonnage of coal that they
Computing from a large sample, one finds the 95% confidence interval for 956; to be {6.8, 14.2}. Based on this information alone, determine the 90% confidence interval for 956
Afterward, each mouse is given a hyperactivity rating score. The mean score was x_bar = 14.9 and s = 2.8. Give a 95% confidence interval for the population mean score μ.
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
the distribution of the amount of money in savings accounts for university of alabama students has an average of 950
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