Exam 19: Questions that Involve Online Topics

TABLE 19-6 A student wanted to find out the optimal strategy to study for a Business Statistics exam.He constructed the following payoff table based on the mean amount of time he needed to study every week for the course and the degree of difficulty of the exam.From the information that he gathered from students who had taken the course,he concluded that there was a 40% probability that the exam would be easy. -Referring to Table 19-6,the optimal strategy using the maximax criterion is to study 16 hours per week on average for the exam.

TABLE 9-1 A manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly.Based on past experience,the population standard deviation is 50 hours and the light bulb life is normally distributed.The operations manager stops the production process if there is evidence that the population mean light bulb life is below 500 hours. -Referring to Table 9-1,if you select a sample of 100 light bulbs and are willing to have a level of significance of 0.10,the power of the test is ________ if the population mean bulb life is 490 hours.

TABLE 19-2 The following payoff matrix is given in dollars. -Referring to Table 19-2,what is the best action using the maximax criterion?

TABLE 19-2 The following payoff matrix is given in dollars. -Referring to Table 19-2,the expected profit under certainty (EPUC)is

A company that manufactures designer jeans is contemplating whether to increase its advertising budget by $1 million for next year.If the expanded advertising campaign is successful,the company expects sales to increase by $1.6 million next year.If the advertising campaign fails,the company expects sales to increase by only $400,000 next year.If the advertising budget is not increased,the company expects sales to increase by $200,000.Identify the events in this decision-making problem.

TABLE 6-1 A company has 125 personal computers.The probability that any one of them will require repair on a given day is 0.15. -Referring to Table 6-1 and assuming that the number of computers that requires repair on a given day follows a binomial distribution,compute the probability that there will be at least 25 computers that require repair on a given day using a normal approximation.

TABLE 16-1 Given below are the average prices for three types of energy products for five consecutive years. -Referring to Table 16-1,what are the simple price indices for electricity,natural gas and fuel oil,respectively,in year 3 using year 5 as the base year?

To determine the probability of getting no more than 3 events of interest in a binomial distribution,you will find the area under the normal curve for X = 2.5 and below.

For a potential investment of $5,000,a portfolio has an EMV of $1,000 and a standard deviation of $100.What is the rate of return?

TABLE 6-1 A company has 125 personal computers.The probability that any one of them will require repair on a given day is 0.15. -Referring to Table 6-1,which of the following is one of the properties required so that the binomial distribution can be used to compute the probability that no more than 2 computers will require repair on a given day?

TABLE 16-2 Given below are the prices of a basket of four food items from 2006 to 2010. -Referring to Table 16-2,what is the unweighted aggregate price index for the basket of four food items in 2010 using 2006 as the base year?

To calculate expected profit under certainty,you need to have perfect information about which event will occur.

Which of the following is used to determine observations that have influential effect on the fitted model?

If the number of blocks in the experiment is larger than 5,the Friedman rank test statistic can be approximated by a chi-square distribution.

As a general rule,one can use the normal distribution to approximate a binomial distribution whenever the sample size is at least 30.

TABLE 12-1 A perfume manufacturer is trying to choose between 2 magazine advertising layouts.An expensive layout would include a small package of the perfume.A cheaper layout would include a "scratch-and-sniff" sample of the product.The manufacturer would use the more expensive layout only if there is evidence that it would lead to a higher approval rate.The manufacturer presents both layouts to 5 groups and determines the approval rating from each group on both layouts.The data are given below.Use this to test whether the median difference in approval rating is different from zero in favor of the more expensive layout with a level of significance of 0.05. -Referring to Table 12-1,what is the value of the test statistic?

For a price index,it is preferable to select the base period in a period of economic stability.

TABLE 19-6 A student wanted to find out the optimal strategy to study for a Business Statistics exam.He constructed the following payoff table based on the mean amount of time he needed to study every week for the course and the degree of difficulty of the exam.From the information that he gathered from students who had taken the course,he concluded that there was a 40% probability that the exam would be easy. -Referring to Table 19-6,what is the expected profit under certainty?

Which of the following is an assumption required by the Analysis of Means (ANOM)?

TABLE 19-6 A student wanted to find out the optimal strategy to study for a Business Statistics exam.He constructed the following payoff table based on the mean amount of time he needed to study every week for the course and the degree of difficulty of the exam.From the information that he gathered from students who had taken the course,he concluded that there was a 40% probability that the exam would be easy. -Referring to Table 19-6,the optimal strategy using the maximin criterion is to study 8 hours per week on average for the exam.