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A random sample of rivets from 2 suppliers were compared to see what the mean diameter was from each and a test to determine whether the population means were the same for the 2 suppliers. Now a comparison of the variation in diameter is needed. Company A has a mean of 0.375 and a standard deviation of 0.00082. Company B has a mean of 0.375 and a standard deviation of 0.03808. What is the appropriate hypothesis test to determine if the 2 suppliers have equal standard deviations (using a significance level equal to 0.05)?
Construct a perfect one-factorization of K_2n for infinitely many values of n. Prove the factorizations are perfect
The following confidence interval is obtained for a population proportion, p:(0.458, 0.490). Use these confidence interval limits to find the point estimate, p-hat.
An overnight express company must include seven cities on its route. How many different routes are possible, assuming that it matters in which order the cities are included in the routing?
You can just switch on the heater of your swimming pool / sauna / living room etc. But if you want to be calculate what time you should switch it on
Based on these data, determine the 95 percent confidence interval estimate for true population mean?
If the average tax payer who makes $140,000 per year owes the government $18,200 with a standard deviation of $1500, and the IRS receives a 1040 tax documents from a customer who earned $140,000 that claims he only owes $12,000, should the IRS sus..
What are its classes? What are their periods? Are they transient or recurrent? Compute the transition probabilities Pi,j .
Probability of fair market is 0.4, and probability of bad market is 0.2, and he wants to maximize his long-run average return. Create the decision table for this problem.
The team wins 50 percent of their night games and 90 percent of their day games. According to today's newspaper, they won yesterday. What is the probability the game was played at night?
The number customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day.
For the set of data below construct a grouped frequency distribution that as well contains the real limits of each interval, midpoint of each interval, the cumulative frequency,
A sample mean, sample size, and population standard deviation are given. Use the P-value approach to perform a one-mean z-test about the mean of the population from which the sample was drawn.
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