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The salaries at a corporation are normally distributed with an average salary of $19,000 and a standard deviation of $4,000.
a. What is the probability that an employee will have a salary between $12,520 and $25,480?
b. What is the probability that an employee will have a salary more than $11,880?
c. What is the probability that an employee will have a salary less than $28,440?
Implement the SES and DES formulae on a spreadsheet program, and use it to determine the optimal parameter a in the SES method giving the best MAPD8 error on the time-series of the previous exercise.
the data shows the list and selling prices for homes. find regression equation letting the list price be independent x
Examine the data and determine if the distribution of IQ scores could be normal. You should confirm or reject normality by means of a visual inspection of the shape of the distribution.
By standing the stem and leaf plot on its side we can see that the corresponding histogram is approximately normal. Use it to assess the empirical rule.
Assume this is true. a random sample of 12 adults 25 or older is selected from general population. what is the probability that you have less than 15%snickers in your bag?
you have purchased five shares of stock in diversified machine tools which has a mean value of 25 and a standard
1.according to a recent survey 275 of 400 middle-aged americans said they used the internet regularly. 140 of 400
The mean size of commercial loans by a bank has been $60,000 in the past. A recent change in the bank's credit policy allows larger amounts to be borrowed under the same terms. Conduct the test. State the alternatives, the decision rule, the value..
Let a be a fixed vector in R2. A mapping of the form L(x) = x+a is called a translation. Show that if a does not equal 0, then L is not a linear transformation. Describe or illustrate geometrically the effect of the translation.
Clearly a straight line model does not accurately describe what is going on with this data. Does this mean there is no relationship between income and time?
a chemical engineer wants to fit a straight line to the data found observing the tensile strength y of 10 test pieces
you compute a correlation coefficient that equals .25. given this what is the value for the explained
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