Takt time is work time available in a given day divided by the customer demand rate per day.

Defect levels below 5% are appropriate for just in time systems.

The width of a confidence interval estimate for a proportion will be

Which of the following distributions is used when estimating the population mean from a normal population with unknown standard deviation? 

A manufacturer of cheese filled ravioli supplies a pizza restaurant chain. Based on data collected from its automatic filling process, the amount of cheese inserted into the ravioli is normally distributed. To make sure that the automatic filling process is on target, quality control inspectors take a sample of 25 ravioli. The critical value used to construct a 99% confidence interval for the true mean amount of cheese filling is

Let the random variable X follow a normal distribution with a mean of 61.7 and a standard deviation of 5.2.What is the value of A such that P(59 

Grandma Gertrude’s Chocolates, a family owned business, has an opportunity to supply its product for distribution through a large coffee house chain. However, the coffee house chain has certain specifications regarding cacao content as it wishes to advertise the health benefits (antioxidants) of the chocolate products it sells. In order to determine the mean % cacao in its dark chocolate products, quality inspectors sample 36 pieces. They find a sample mean of 55% with a standard deviation of 4%.  The 90% confidence interval for the true mean % cacao is

In examining the invoices issued by a company, an auditor finds that the dollar amounts of invoices have a mean of $1,732 and a standard deviation of $298. What is the probability that for a sample of 45 invoices, the average invoice is greater than $1,800?

A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain’s new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed. Using this sample the estimated population mean is $50.50 and the estimated population variance is 400. Assuming the distribution of the amount spent on their first visit is approximately normal, what is the shape of the sampling distribution of the sample mean that will be used to create the desired confidence interval for μ?

A large software development firm recently relocated its facilities. Top management is interested in fostering good relations with their new local community and has encouraged their professional employees to engage in local service activities. They wish to determine the average number of hours the firm’s professionals volunteer per month. They find the 95% confidence interval of 14.62 to 15.78. Which of the following is the correct interpretation?I. We are 95% confident that the average number of hours per month volunteered by professionals employed with this firm is between 14.62 and 15.78.II. 95% of all firm’s professional employees volunteer between 14.62 and 15.78 hours per month.III. The number of hours per month volunteered by the firm’s professional employees is between 14.62 and 15.78 95% of the time.