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1 .suppose that family incomes in a town or normally distributed with a meeting of $1,120 and a standard Deviation of $ 600 per month .What is the probability that a given family has an income over $ 2000 per month ?2 . During the last week of the semester , students at a certain college spends on the average 4.2 hours using the school's computer terminals with a standard deviation of 1.8 hours .for a random sampling of 36 students at that collage , find the average time spent using the compute terminal during the last week of the semester a, at least 4.8 hoursB ; between 4.1 and 4.5 hours
A Federal funding program is available to low income neighborhoods. To qualify for the funding a neighborhood must have a mean household income of less then $15,000 per year.
One man can fix a machine in four hours and two men working together can fix a machine in three hours. The total maintenance cost (including downtime cost) in the case of two repairmen on duty is:
Build a scatter plot, Find the value of the linear correlation coefficient r, and find the critical value of r using α=0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.
Estimate the probability that a randomly selected jar will have a fill, x, that is out of specification. Assume that the process is in control and that the population of all jar fills is normally distributed.
x1 = 100 and x2 = 127 successes were observed. What is the best point estimator for the difference ( p1-p2) in the two binomial proportions?
The average cost of a renting a compact size car in a major metropolitan area is R51.74 with a standard deviation of 7.48. Assume a normal distribution.
A random sample of 90 voters found that 38% were going to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
Suppose the budget has the support of 52% of the voters. What is the probability that the newspaper's sample will lead it to predict defeat?
Use this information to construct a probability table, and then calculate each of the following probabilities:
Your company manufactures low calorie frozen dinners. The advertised calorie content is 200 calories. A consumer activist group, FACT: fat and calories tribunal, is claiming that your product is not consistent.
A sample of 70 orders revealed that 57 were delivered in promised time. At .02 significance level, can we conclude that less than 87 percent of orders are delivered in less than 10 minutes?
Compute the confidence intervals of your data from the Week 4 Learning Team paper. Based on your confidence intervals.
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