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Based on data collected from its production processes, Crosstiles Inc. determines that the breaking strength of its most popular porcelain tile is normally distributed with a mean of 400 pounds per square inch and a standard deviation of 12.5 pounds per square inch.  Based on the 68-95-99.7 Rule, about what percent of its popular porcelain tile will have breaking strengths greater than 412.5 pounds per square inch?

Data were collected on annual personal time (in hours) taken by a random sample of 16 women and 7 men employed by a medium sized company.  The women took an average of 24.75 hours of personal time per year with a standard deviation of 2.84 hours.  The men took an average of 21.89 hours of personal time per year with a standard deviation of 3.29 hours.  The standard error of the sampling distribution for the difference between the two means is ________________________ .

Data were collected on annual personal time (in hours) taken by a random sample of 16 women (group1) and 7 men (group 2) employed by a medium sized company.  The women took an average of 24.75 hours of personal time per year with a standard deviation of 2.84 hours.  The men took an average of 21.89 hours of personal time per year with a standard deviation of 3.29 hours.  The Human Resources Department believes that women tend to take more personal time than men because they tend to be the primary child care givers in the family. The correct null and alternative hypotheses to test this belief are ________________________ .

A study examined consumption levels of oil and carbon dioxide emissions for sample of counties. The response variable in this study is ________________________ .

The administration of a large university is interested in learning about the types of wellness programs that would interest its employees.  Suppose that there are five categories of employees (administration, faculty, professional staff, clerical, and maintenance) and the university decides to randomly select ten individuals from each category.  This sampling plan is called ________________________ .

A small independent organic food store offers a variety of specialty coffees.  To determine whether price has an impact on sales, the managers kept track of how many pounds of each variety of coffee were sold last month.     Based on the scatterplot, the linear relationship between number of pounds of coffee sold per week and price is ________________________ .

When is the most effective time to introduce grief counseling?

Data were collected on annual personal time (in hours) taken by a random sample of 16 women (group1) and 7 men (group 2) employed by a medium sized company.  The women took an average of 24.75 hours of personal time per year with a standard deviation of 2.84 hours.  The men took an average of 21.89 hours of personal time per year with a standard deviation of 3.29 hours.  The Human Resources Department believes that women tend to take more personal time than men because they tend to be the primary childcare givers in the family.  The results of the test are t = 2.02 with an associated P-value of 0.0352.  The correct conclusion at α = 0.05 is to ________________________ .

An army depot that overhauls ground mobile radar systems is interested in improving its processes.  One problem involves troubleshooting a particular component that has a high failure rate after it has been repaired and reinstalled in the system.  The shop floor supervisor believes that having standard work procedures in place will reduce the time required for troubleshooting this component.  Time (in minutes) required troubleshooting this component without and with the standard work procedure is recorded for a sample of 19 employees.  In order to determine if having a standard work procedure in place reduces troubleshooting time, they should use ________________________ .

An army depot that overhauls ground mobile radar systems is interested in improving its processes.  One problem involves troubleshooting a particular component that has a high failure rate after it has been repaired and reinstalled in the system.  The shop floor supervisor believes that having standard work procedures in place will reduce the time required for troubleshooting this component.  Time (in minutes) required troubleshooting this component without and with the standard work procedure is recorded for a sample of 19 employees. The P-value associated with the calculated test statistic is < 0.001.  At α = 0.05, the correct conclusion is to ________________________ .