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1. What symbol is used to represent the mean of the sampling distribution of y-(ybar)? Explain
2. What symbol is used to represent one value from the sampling distribution of y-(ybar)? Explain
Place the steps below in the correct order for the construction of a control chart.
There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. (a) Determine the standard error of the proportion.
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
A battery manufacturing plant normally operates two eight-hour shifts per day and 6 days per week. The manufacturer can produce 375 units per hour.
A random sample of 20 vice presidents of Fortune 500 firms is taken. The amount each vice president paid in federal taxes as a percentage of gross income is determined.
How many units of capacity should be built to minimize the total cost of providing capacity plus lost sales?
The probability that a bomber hits a target on a bombing mission is 0.700. Three bombers are sent to bomb a particular target.
Calculate the correlation coefficient. What is the coefficient of determination from these sample statistics? What does this coefficient indicate?
Determine relative frequency of X=4? Generate the cumulative frequencies.
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
Using a 5% level of significance, can we say that, generally there is important difference between satisfaction levels of mid country residents and coastal residents?
Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.
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