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What does a squared correlation coefficient represent? Also, does the strength of the correlation depend on the direction? Finally, does correlation imply causation.
The standard deviation of the time to complete the entire homework assignment
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best?
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
A health care analyst would like to know that if the duration of a given eye surgical procedure has a normal distribution with a mean of 240 minutes and a standard deviation of 40 minutes
A study group of long distance phone calls made from the corporate offices of Pepsi Bottling Group, Inc., in Somers, New York, revealed the length of the calls, in minutes, follows normal probability distribution.
Findout the variance also standard deviation for the 2 distributions above. Evalute the variation of the data sets.
There are predictable stages through which every critical thinker must pass. Under what circumstances might one regress from one stage to a previous one?
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
Compare two month moving average also exponential smoothing using MAD. The subsiquent data represents demand for company ABC's products for the last 10 months.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
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