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A customer relations bureau located in a large eastern city claimed that 80% of the complaints registered with it were settled to the satisfaction of the customers. The local newspaper, doubting whether the percentage was really that large, takes a random sample of 40 complainants and asks them whether they had received satisfaction. Only 12 indicate that they had. Use the normal approximation to make a test of significance at a = 0.01.
A company assembles remote controls for television sets. The company's design engineers have developed a revised design that they think will make it faster.
A lending firm knows a financial application takes on average 12.8 minutes and has a standard deviation of 2.1 minutes. Conduct a full hypothesis test for this problem
If the population standard deviation is $7, and a random sample of 50 properties is chosen, what is the probability that the sample average will be below $35?
Identify a real-life example or application of either the binomial or Poisson distribution. Specify how the conditions for that distribution are met.
suppose x is a discrete random variable with probability distributionx01fx1-ppin other words x is a bernuolli random
A production process that is in control has a mean (m) of 80 and a standard deviation (s) of 10. Determine the upper and the lower control limits for sample sizes of 25
How can designed experiments facilitate the application of the Shewhart-Deming PDCA cycle?
a first is accustomed to training operators who do certain tasks on a production line. those operators who attend the
The number of rescue calls received by a rescue squad in a city follows a Poisson distribution with µ = 2.83 per day.
The director of purchasing asked for samples of 175 from each manufacturer. The numbers of acceptable and unacceptable bulbs from each manufacturer are shown below. At the 0.05 significance level, is there a difference in the quality of the bulbs?
If the number of trials during each experiment is 12, determine the maximum likelihood estimate for the probability of success, p.
The data file called CEO Compensation contains data for the CEOs of 496 of the nation's top 500 companies in 2005. These data are published by the Forbes organization and are available on its Web site (www. forbes.com/2005/04/20/05ceoland.html).
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