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Question: Your manager has given you an Excel file that contains the names of the company's 500 employees and has asked you to sample 50 employees from the list. You decide to take your sample as follows. First, you assign a random number to each employee using Excel's random number function Rand(). Because the random number is volatile (it recalculates itself whenever you modify the file), you freeze the random numbers using the Copy-Paste Special-Values feature. You then sort by the random numbers in ascending order. Finally, you take the first 50 sorted employees as your sample. Does this approach constitute a statistical or a nonstatistical sample?
What is the margin of error for the survey?- Give an interval of values that probably covers the true percentage of the population that saw the UFO.
To investigate he selects a sample of eight weeks and determines the number of new cars sold and the number of sales people on duty for that week. a) What are the dependent and independent variables?
The First National Bank of Wilson has 680 checking account customers. A recent sample of 60 of these customers showed 32 have a Visa card with the bank.
Jim Sellers is thinking about producing a new type of electric razor for men. If the market were favorable, he would get a return of $100,000, but if the market for this new type of razor were unfavorable
Mayfair's insurance company proposed a settlement based on lost sales of $240,000 in July and August. Is this amount fair? If not, what amount would you recommend as a counteroffer?
Develop a 97% confidence interval for the true population proportion.
What is the probability that the student is both a sophomore and a history major?
three people who do not know each other are standing in line at a movie theatre waiting for the box office to open.
The following data come from a census of desert birds. Using these data, calculate the following: arithmetic mean; standard deviation; variance; standard error of the mean; and coefficient of variation
in exercises 9.55-9.60 we have given the value obtained for the test statistic z in one mean z-test. we have also
Draw a model of the relation {(-6,-8), (3,-3), (-6,-7), (9,7)}. Is the relation a function? Why or why not? Evaluate the function at the specified values of the independent variable and simplify.
Consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome with probability 0.62. Create a new experiment consisting of repeating the original experiment 3 times. Assume each repetition is independent of..
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