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The following data show U.S. production of motor vehicles versus tons of domestic steel shipped for motor vehicle manufacture.
a. Determine the least-squares regression line and calculate r.
b. What proportion of the variability in steel shipments for motor vehicles is explained by the regression equation?
c. During a year in which U.S. production of motor vehicles is 12.0 million, what would be the prediction for the number of tons of domestic steel used for vehicle production?
The following information was obtained from two independent samples selected from two normally distributed populations with unknown but equal variances.
Given a normal distribution with a population mean of 100, a standard deviation of 10 and a sample size of n = 25, what is the probability that X is
suppose we want a 90 confidence interval for the average amount of time in minutes spent per week on homework by the
In a certain craps game at a casino, if you place a bet on the "4", and a 4 comes up on a roll of the two dice before a 7 comes up, the payout odds are 9 to 5. Convert these odds to the player's win probability.
Suppose that n = 9, ¯X = 85 and the sample standard deviation is s = 2. Test H0: μ = 83 against H1 : μ ≠ 83, stating any assumptions made about the underlying population, and the testing procedure.
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
q1. in a city in italy 30 of the families have a mastercard 20 have an american express card and 25 have a visa card.
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
1. if x is normally distributed with a mean of 70 and a standard deviation of 7 finda. px less than or equal to 76b.
The probability that a male will be color blind is 0.042. Use the normal curve approximation to the binomial distribution to find the probabilities that in a group of 53 men, no more than 6 are color-blind.
At the .01 significance level, can we conclude that there is more variation?
Find the probility that a randomly selected student has neigther credit card. Find the probability that a randomly selected student has a Mastercard or a Visa or both.
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