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Suppose you just received a shipment of eight televisions. Four of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
The table below shows the probability distribution of the annual sales (in Millions) of a small rm. Calculate the Expected value, Variance, and Standard deviation of the annual sales?
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities.
Give a 95% confidence interval for the mean of the population from which the sample is drawn.
Describe the situation and the variables and determine whether the variables are normally distributed or not. How could you change these to a normally distributed dataset?
In a random sample of 500 families owning sets in the town was found that 340 subscribed to ASTRO. Find a 95% confidence interval for actual proportion of families in this town who subscribe to ASTRO.
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
In a sample of 200 women, 144 of them said they were in debt. Test the claim that women are in deeper debt than men, at a=0.01.
Critically discuss how you can apply the concept and method of interval estimation to help you solve some of the problems in a regularly accounting department. Give a few examples.
The correlation between hours spent in the course and exam grades is .8. what percent f variation in exam grades can be explained by hours spent in the course?
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
Quarterly customer surveys are taken at a medical center. Each individual department has scores and is comparted to the medical center average. Department of Physical Therapy had scores of 9.14, 9.19 and 7.75 for quarters 1-3 respectively.
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