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The results shown beloware mean productivity measurements (average number of assemblies completed per hour) for a random sample of workers at each of three plants. Research question: Are the mean hourly productivity levels the same for workers in these three plants?
(a) Find the median cost of houses at Coal City in 1988. (b) Find the modal selling price of houses at Coal City in 1988.
Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
Suppose you obtain a 100 bag random sample by taking 25 subgroups of 4 bags each, the mean weight of the 25 subgroups was 16.00 ounces with a total of the subgroup ranges of 87.5 oz.
Utilizing the 5% level of significance as there was a significant change in cholesterol level. Their total cholesterol levels before also after the diet.
Determine a 90% confidence interval estimate of the mean head circumference of all two-month-old babies.
If Accrotime guarantees full refund on any defective watch for 2 years after purchase, determine percentage of total production will company expect to replace?
What value will standard deviation σ x of sampling distribution approach? How do two x distributions for sample size n = 50 and n = 100 compare?
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.
Assume men's weights are normally distributed w/ a mean of 172 lb. and a s.d. of 29lb.
Design a contingency table that will hold your data. What are your degrees of freedom and critical value at a 0.05 confidence level? You do not need data to answer this.
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