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A trucking firm suspects that the variance for a certain tire is greater than 1,000,000. To check the claim, the firm puts 101 of these tires on its trucks and gets a standard deviation of 1200 miles. If a = 0.05, test the trucking firm's claim using confidence intervals.
Scores by women on the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202. Scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6.
Assume that your students are a sample of all fourth graders in your state and you can use your student data to test some ideas. What is the major problem with your assumption.
A normal curve with a mean of 15.0 gal and standard deviation of 0.1 gal. What is the probability that a randomly selected tank will hold.
Determine the minimum sample size to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.2 years.
Planning Investments. Your uncle has $90,000 that he wishes to invest now in order to use the accumulation for purchasing a retirement annuity in five years. After consulting with his financial adviser, he has been offered four types of fixed income ..
A marketing poll revealed that 45% of Americans say they that they have dinner regularly as a family. You randomly choose 10 American families and ask if they regularly have dinner together as a family.
airline overbooking is a common practice. due to uncertain plans many people cancel at the last minute or simply fail
Using the below information in a linear programing problem maximize the profit for product A and B. Provide how many of each product should be produced and what is the profit at that level?
Which of the following is not an advantage of using a cluster sample instead of other types of samples?
Suppose the average value of P is $ 3 and average value of Po is $ 6. Determine the price elasticity at average values of P and Po?
Let"s consider the very large database of individual incomes from the Bureau of Labor Statistics as our population. It is strongly right skewed. How large a sample size?
Show how to generate a random variable from the exponential distribution function shown above. Show derivation of the equation.
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