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A particular manufacturing design requires a shaft with a diameter between 19.88 mm and 20.018 mm. The manufacturing process yields shafts with diameters normally distributed, with a mean of 20.005 and a standard devivation of 0.006 mm.
a. For this process, what is the proportion of shafts with a diameter between 19.88 mm and 20.00 mm?
w. edwards deming in his red bead experiment had a box of 4000 beads of which 800 were red and 3200 were white.
assume x is normally distributed with a mean of 12 and a variance of 16.a calculate p9ltxlt17b find x1 such that pxgtx1
What size sample would be required to estimate the proportion of hospital referrals with a margin of error of 0.04 or less at 95% confidence?
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?
For a sample with n=36, the mean duration of a geyser is 3.55 minutes and the standard deviation is 0.63 mintues. Using chebychev's theory, determine at how many of the eruptions lasted between 2.29 and 4.81 mintues.
The experimental medication of the placebo. Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups.
While exploring data that was collected for an investigation of resources needed for software testing and improvement, you have found an outlier.
In a water treatment plant, the turbidity level, and is suspected is linearly related to inches of accumulated rainfall in the month, x. The following information related to the waste water plant is available:
What is the probability that an individual will be a salaried employee whose intrinsic satisfaction value is 5 or more?
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
Medium-sized college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results.
Please define correlation and regression. Describe a management or business-related scenario where a researcher might be interested in whether a number of variables are correlated (without any assumptions about causation).
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