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During nine days in a festival, the highest sale of a shop was on sunday and was 900„5 more than the average sale for other days. If the standard deviation of the sale during the festival is 33.33, find the standard deviation leaving that the highest sale.
In the data collected for construction of c chart, the average number of defects per unit of output is c = 7.5. Discuss the 3-sigma upper and lower control limits for the control chart?
Which trend model is best, and why? If none is satisfactory, explain. Make a forecast for 2004 by using a trend model of your choice or a judgment forecast.
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
Determine the frequency of wrong numbers given to callers. Each sample consisted of 100 calls. Determine 95 pct limits. Is the process stable(i.e., in control)? explain.
Find out the value of correlation coefficient. Make a regression model to predict winning percentage utilizing all of the data.
Create the estimated regression equation by calculating the values of b 0 and b 1
Compute the probability that, in a random sample of 500 students, at least 20 lie frequently, assuming the true percentage is 3%.
In the graphical method, how do you know when a problem is infeasible, unbounded, or when it has multiple optimal solutions? Give a real-world example of when you could have an infeasible problem.
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment.
If the null hypothesis is rejected, can you state that the mean score of those with a rural background is different from the score of those with a large-city background?
Use a 0.05 significance level to test the claim that unfiltered king-size cigarettes have a mean tar content greater than that of filtered 100 mm cigarettes.
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