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Sample size and margin of error. The margin of error for a confidence interval depends on the confidence level, the standard deviation, and the sample size. Fix the confidence level at 95% and the standard deviation at 1 to examine the effect of the sample size.
Find the margin of error for sample sizes of 5 to 100 by increments of 5-that is, let n = 5, 10, 15,..., 100. Plot the margins of error versus the sample sizes and summarize the relationship.
Write the following phrase using symbols. 4 times the sum of m and q. Elaine was charged $195 interest for 1 month on a $1000 credit card balance. What was the monthly interest rate
the mean iq score of adults is 100 with a standard deviation of 15. use the empirical rule to find the percentage of
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
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..
This assignment is due on Friday, July15th at 11:59pm. The file (S16220ExcelAssign2) containing the data for this assignment can be found on Blackboard and your solution (by completing the worksheet containing the data and using Solver) is to be s..
Calculate the correlation coefficient and determine whether it is statistically significant using a two-tailed test at the .05 level.
a sample standard deviation of 1.1%. Using alpha = 0.05, does the analyst have statistical evidence to reject the claim made by the magazine?
Use the Excel Analysis ToolPak to find the linear correlation coefficient for the systolic and diastolic measurements. Use the Excel Analysis ToolPak to determine the linear regression equation that uses the systolic pressure to predict the diastoli..
A company receives shipments of a component used in the manufacture of a component for a high-end acoustic speaker system. When the components arrive, the company selects a random sample from the shipment and subjects the selected components to a..
R2 000 is invested at 10% per annum compounded half-yearly. After three months, the interest rate changes to 12% per annum compounded monthly. Find the value of the investment after two years.
1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of
A random sample of 75 houses is taken and the average price is computed. What is the probability that the sample mean exceeds $3 million?
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