2.A computer manufacturer estimates that its line of minicomputers has, on average, 8.5 days of downtime...

2.A computer manufacturer estimates that its line of minicomputers has, on average, 8.5 days of downtime per year. To test this claim, a researcher contacts seven companies that own one of these computers and is allowed to access company computer records. It is determined that, for the sample, the average number of downtime days is 5.1, with a sample standard deviation of 1.5 days. Assuming that number of downtime days is normally distributed, test to determine whether these minicomputers actually average 8.5 days of downtime in the entire population. Let α = .01.

(Round your answer to 2 decimal places.)

The value of the test statistic is ________

Expert Solution

orchestra answered 1 year ago

A computer manufacturer estimates that its line of minicomputers has, on average, 8.6 days of downtime...

A computer manufacturer estimates that its line of minicomputers has, on average, 8.6 days of downtime per year. To test this claim, a researcher contacts seven companies that own one of these computers and is allowed to access company computer records. It is determined that, for the sample, the average number of downtime days is 5.2, with a sample standard deviation of 1.1 days. Assuming that number of downtime days is normally distributed, test to determine whether these minicomputers actually...

The computer center at Rockbottom University has been experiencing computer downtime. Let us assume that the...

The computer center at Rockbottom University has been experiencing computer downtime. Let us assume that the trials of an associated Markov process are defined as one-hour periods and that the probability of the system being in a running state or a down state is based on the state of the system in the previous period. Historical data show the following transition probabilities: To From Running Down Running 0.70 0.30 Down 0.20 0.80 If the system is initially running, what is...

A computer manufacturer estimates that its cheapest screens will last less than 2.8 years. A random...

A computer manufacturer estimates that its cheapest screens will last less than 2.8 years. A random sample of 61 of these screens has a mean life of 2.4 years. The population is normally distributed with a population standard deviation of 0.88 years. At α=0.02, what type of test is this and can you reject the organization’s claim using the test statistic?

11.A computer manufacturer estimates that its cheapest screens will last less than 2.8 years. A random...

11.A computer manufacturer estimates that its cheapest screens will last less than 2.8 years. A random sample of 61 of these screens has a mean life of 2.5 years. The population is normally distributed with a population standard deviation of 0.88 years. At α=0.02, what type of test is this and can you support the organization’s claim using the test statistic? Claim is alternative, reject the null and support claim as test statistic (-2.66) is in the rejection region defined...

2 ) Warren W. Fisher Computer Corporation purchase 8000 transistors each year as components in minicomputers....

2 ) Warren W. Fisher Computer Corporation purchase 8000 transistors each year as components in minicomputers. The unit cost of each transistor is $10, and the cost of carrying one transistor in inventory for a year is $3. Ordering cost is $30 per year. Fisher operates his business 200 days per year and finds that deliveries from his supplier generally take 5 working days. 1. What is the optimal order quantity? 2. What is the expected number of orders placed...

A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3...

A computer memory manufacturer specifies that its memory chip stores data incorrectly an average of 6.3 out of 10 million cycles with a standard deviation of 0.48. A batch of 30 chips your company ordered stores data incorrectly an average of 6.9 times per 10 million cycles. a. Does it seem reasonable that your 30 chips are a random sample from a population with the specifications given by the computer memory manufacturer? Use a = 0.052 tail. b. What is...

discussion one : Healthcare has become increasingly dependent on information systems and computer. Downtime disasters can...

discussion one : Healthcare has become increasingly dependent on information systems and computer. Downtime disasters can occur when healthcare organizations are not prepared for downtime situations. Therefore, as nurses, you must be aware of downtime procedures to ensure quality patient care during a downtime crisis. You will discuss the following: i Explain the importance of an organization-specific downtime risk assessment. Describe the pros and cons of different assessment tools for evaluating downtime events and discuss scenarios in which they might...

A firm estimates that its average-risk projects have a WACC of 10%, its below-average risk projects...

A firm estimates that its average-risk projects have a WACC of 10%, its below-average risk projects have a WACC of 9%, and its above-average risk projects have a WACC of 12%. Which of the following projects (A, B, and C) should the company accept? A:Project B is of below-average risk and has a return of 9.5%. B:Project C is of above-average risk and has a return of 11.5%. C:Project A is of average risk and has a return of 9%....

A firm has days' sales in an inventory of 105 days, an average collection period of...

A firm has days' sales in an inventory of 105 days, an average collection period of 35 days, and takes 42 days, on average, to pay its accounts payable. Taken together, what do these three figures imply about the firm's operations and its cash flows?

1.) badBanana co. has an average age of inventory equal to 25 days. if its end...

1.) badBanana co. has an average age of inventory equal to 25 days. if its end of year inventory level is $8,500, then what does that imply for the cost of goods sold during the year? (round to the nearest dollar) a.) $582 b.) $4964 c.) $21,250 d.) $124,100 2.) What Ratio measures the ability of the firm to satisfy its short term obligations as they come due? a.) TImes Interest and earned ratio b.) current ratio c.) Inventory turnover...

Question