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Question: Fuel Consumption and Cars The joint venture ContiTechJiebao Power Transmission Systems Ltd. produces many makes and models of automobile drive belts. One popular poly V-belt is designed to have length 1050 mm. To ensure that the belts meet this specification, 18 are randomly selected from the assembly line every hour and carefully measured. If there is any evidence that the population mean length is different from 1050 mm, the entire line is shut down for inspection.
a. Assume the distribution of belt lengths is normal and σ = 3.7 mm. In a two-sided hypothesis test of H0: μ = 1050 versus H0: μ = 1050, find the critical values in the X¯ world. Use a = 0.01.
b. In a sample of 18 belts, suppose x¯ = 1049. Should the assembly line be shut down? Justify your answer using the Z distribution and the appropriate X distribution.
there are c different types of coupon and each time you obtain a coupon it is equally likely to be any of the c types.
In no less than 100 words, how do you satisfy the needs of a customer; what is the market analysis, research and strategies.
(a) State H0 and Ha. (b) Find the criticalvalue(s). (c) Find the standardized test statistic z. (d) Decide whether to reject or fail to reject the null hypothesis and interpret the decision.
According to BusinessWeek, the average market value of a biotech company is less than $250 million. Suppose that this indeed is the alternative hypothesis.
Find the APV of each of the following contracts. At time 0 the process is in state 0. A contract provides for a payment of 1000 at time k, k = 0, 1, 2, 3, provided the process is in state 0 at time k.
Assume the population standard deviation (s) is 0.5 and the sample size (n) is 100. Calculate the values for alpha, a type I error and beta, a type II error. (To calculate Beta, consider a mean that is 1 standard error away from the lower end valu..
Let the random variable x represent the number that are not correctly calibrated. Find the mean and standard deviation for the random variable x.
Connie wants to have an annuity payment of $2,000 at the END of every three months. How much should she deposit now at 6% interest, compounded quarterly, to yield this payment for 3 years? (Use Table 12-2 in your text)
q1. in a game of chance a number of draws are placed with replacements from a box of tickets 500 of these tickets are
Find the linear regression model for the South Central states. How does the equation for the South Central states compare to the one you found for the North Central states?
A researcher expects the population proportion of the Cubs Fans in Chicago to be 80%. Error of less than 5% confident of an estimate to be made from a mail survey. What is the sample size required?
suppose that certain tool bits are package 20 to a box and the following sampling plan is used. a sample of three tool
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