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In this question are you just using the empirical rule?
You know that your population is normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule as a rough approximation, what is the probability that a score selected at random is
Above 100
Below 85
Below 130
consider the following simple model for daily changes in the price of a stock. suppose that on each day the price
an automotive center keeps tracks of customer complaints received each week. the probability distribution for
Conducting a Descriptive Research Study "Barriers to Accepting Health Information Technologies"
What sample size is needed to estimate with 95 persent confidence the mean intake of calcium within 20 units of the true mean if the intake is normal with a variance of 1900 units?
How many of each type of ad should be placed in order to minimize the cost of achieving the minimum required total exposure? Use the auxiliary variable
What is the idea behind linear regression? What is it? Why do it? What are some limitations of linear regression?
In a survey of 750 senior business executives by Business Week magazine, 56% indicated that they felt that even if merit and abilities are equal, people with MBAs often get promoted faster than people without the degree. Prepare a 92% confidenc..
Assume the distribution of the length of the cuts follows a normal distribution with a standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CDs sold by CRA CD's Inc. What can we say about the shape of the distributio..
The vehicle speeds at a particular interstate location can be described by a normal curve. The mean speed is 67 mph, and the standard deviation is 6 mph.
You have a chance to buy one of two cars. They are about the same age and appear to be in equally good condi- tion. Would you rather buy the one with a positive residual or the one with a negative residual? Explain.
calls to a customer service center last on average 1.8 minutes with a standard deviation of 1.5 minutes. an operator in
If the contents in the population of all cans follow a normal distribution, what is the probability that the mean contents of a six-pack are less than 12 oz?
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