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A filling process at your plant injects a specialty dielectric filling into an exterior wall for the product. To meet standards, the process must inject 10 cubic centimeters of dielectric, or the wall must be reprocessed at a cost of $20. The quantity injected is normally distributed with a mean of 10 cubic centimeters and a standard deviation of 0.4 cubic centimeters. A cubic centimeter of this dielectric costs $10. A correctly constructed wall is $230 of the overall build price.
a. What is the probability that the wall will be underfilled?
b. The manager wants to adjust the mean to reduce the reject rate. Compute the probability of underfilling for several values of the mean fill. How much extra per wall does it cost to ensure a 99% acceptance rate?
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviations, (D) variance, and (E) standard deviation:
Give an understanding with the difference between a population, a sample, and a sampling distribution. Uus a Java applet and external web sites for comment/reference.
Using the raw measurement data presented below, calculate the t value for independent groups to determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
A survey is planned to determine the mean annual family medical expenses of employees of a large company. The management of the company wishes to be 95% confident that the sample mean is correct to within plus-or-minus $50 of the population mean.
Paired samples t-test for the given data - financial advice from the voluntary organization - A local voluntary organization affiliated to the Citizens Advice Bureau offers free financial advice to residents in the area who are registered debtors
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain (one paragraph in length).
Develop percent frequency distribution and construct bar chart and pie chart.
Plot the graphs of the following and identify the graph that represents the cooresponding functions and justify your answer.
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
Provide an explanation of a chi-square test. Why would you use the chi-square statistic? What type of data is used with chi square analysis?
What is the null hypothesis in a chi-squared test of independence? How many 'tails' can a chi-squared test have, one or two? In a regression analysis, what do the residuals from the fitted line add up to?
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