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Explain to management what your findings are and what this suggests about future decisions vs work options. Do a test to see if workers attitudes on this matter have changed using a 90% alpha.
Productivity at Acme was observed among 12 employees. Test (99%) whether there has or has not been a change in productivity.
Acme Veggies conducted surveys in two cities to see what attitudes are like regarding organic vegetables and prices. What does your result say about attitude consistency across cities?
Construct a 95% confidence interval estimate for the average waiting time of all the patients who visit this doctor. Assume the population of waiting times is normally distributed.
Management is concerned. Perform a hypothesis test to determine if this change in sales is a potential problem. Make a recommendation to management based on your resu
Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
Setup the alternative hypothesis that will test the claim that the percentage of women preferring white wine is 25% higher than men.
As before, they are measured on a interval-ratio scale and are normally distrusted; he believes that studying under quiet conditions will lead to better performance.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. What is df for this test?
Estimate the variance of the model at x_0 = 7. Turn in your estimate and an explanation of how you came up with that estimate.
What variables might explain or predict an outcome in your department or life? If you generated a regression equation, how would you interpret it and the residuals from it?
Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the employees of the business?
As a test the truck company purchases a random sample of metal parts from Steel-R-Us, and then determines if these parts were delivered on-time. Which hypotheses should they test?
Households will be selected from the population. What is the probability that the sample proportion will be within ±0.02 of the population proportion?
What should you conclude? Use the .05 level. What should you conclude? Use the .05 level. (a) Use the steps of hypothesis testing, (b) figure the effect size for the study.
What is the best scenario for the bank , as when using a decision tree analysis, whether the bank should buy a new generator or not?
The regression equation is Y = 29.29 - 0.96X, the sample size is 8, and the standard error of the slope is 0.22. What is the critical value to test the significance of the slope at the 0.01 signifi
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression?
If there are 12 business-class passengers and 50 tourist-class passengers on a particular flight, what are the expected value of total luggage weight and the standard deviation of the total luggage
A new speed limit will be initiated such that approximately 10% of vehicles will be over the speed limit. What is the new speed limit based on this criterion?
With the last class having an interval from 700 to 749. Two applicants scored in the interval 450 to 499, and 16 applicants scored in the interval 500 to 549. What percentage of applicants scored be
1-ounce chocolate chip cookies resulted in the following calorie amounts. At the a _ 0.01 level, is there sufficient evidence that the average calorie content is greater than 110 calories?
What is the probability that a customer who has two or more late payments will default? Does the credit manager's policy seem reasonable? Explain your response.
What is the minimum-cost schedule for the bank? What are the limitations of the model used to answer the above question?