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1. When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
A. 0.294 to 0.306B. 0.0228 to 0.0372C. 0.0299 to 0.0300
2. A restaurant monitors its customer's complaints. Here are the percent of customers with the following complaints:
With this information, what should be the first target for improvement?A. High pricesB. Preparing food correctlyC. Slow service
The mean noise level of stroke floors in 20 different hospitals was 63.1 dBA, and the standard deviation was 4.1 dBA. The mean noise level for 24 hospital operating rooms was 56.3 dBA and the standard deviation was 7.5 dBA. At α = .05 can it be co..
Suppose x has a uniform probability distribution. Is the amount dispensed by the machine a discrete or a continuous random variable? Find the mean and standard deviation for the distribution.
The monthly sales volume (in thousands of dollars) for a manufacturer of snow skis is seasonal (there tend to be more skis sold during fall and winter months than during warmer months). The following table shows the monthly seasonal indexes for th..
The regression of Y on X predicts? When predicting Y, adding a second predictor variable to the first predictor variable X.
A rectangular field has to be formed with a given total fence length of P meter of fence material. Find the dimensions of the rectangle which will maximize the fenced area.
A real emergency situation is a rare event, with a probability 0.004. Given that the alarm has just sounded, what is the probability that a real emergency situation exists?
Suppose that 50% of all people are opposed, evaluate probability of getting at least 89% opposed in survey of 1012 randomly selected people.
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Having obtained the z score and then derived the percentage... what does the percentage tell you?
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy and electronically file a 1040 tax form. The distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchd..
The number of hours a light bulb burns before failing varies from bulb to bulb. The distribution of burnout times is strongly skewed to the right. The central limit theorem says that
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