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A random sample of 43 cars in the drive-thru of a popular restaurant revealed an average bill of $19.99 per car. The population standard deviation is $6.49. Estimate the mean bill for all cars from the drive-thru with 91%confidence. Round the answers to 2 decimal places.
The Boston Transit Authority wants to determine whether there is any need for changes in the frequency of service over certain bus routes.
The probability that the female survives the year is 0.999642. Compute and interpret the expected value of this policy to the insurance company.
A recently installed assembly line has problems with intermittent breakdowns. Recently, it seems that the equipment fails at some point during 15% of the eight-hour shifts that the plant operates. Each day contains three consecutive shifts. State ..
a carnival game is supposed to result in a win 30 of the time. the wheel is checked each month. this month the wheel is
A variety of popular health books suggest that the readers assess their health, at least in part, by estimating their percentage of body fat.
estimate the means of the populations from which samples were drawnavoid the assumption of homogeneity of
Let P(x,y) be x has been to y, where the domain of discourse for x is all students in this class, and the domain of discourse for y is all countries in the world. Express the following propositions in English.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
Explain in your own words what it means to say that we have 95% confidence in the interval estimate. Then give an example of something you do in your life.
1. What are the uses of decision analysis? 2. What are the limitations of decision analysis? 3. List the elements of a decision problem, and explain how they interrelate.
Suppose the experiment E consists of tossing a fair coin twice.The sample space may be represented by s={HH,HT,TH,TT} .Given that the coin is fair and that the coin is tossed in an independent and identical manner, it is reasonable to apply the eq..
The probability that 0, 1, 2, 3 or 4 people will seek treatment for the flu during any given hour at any given emergency room is shown in the following distribution. What are the variance and standard deviation of X?
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