In a random sample of 5 microwave ovens, the mean repair cost was $75.00 and the standard deviation was $12.50. Construct a 95% C.I. for the population mean. Assume Normality. (Please show your work)

The mean cost of a five pound bag of shrimp is 50 dollars with a standard deviation of 8 dollars. If a sample of 56 bags of shrimp is randomly selected, what is the probability that the sample mean would be greater than 49.1 dollars? Round your answer to four decimal places.

The cost of a wedding has skyrocketed in recent years. As a result, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised that the cost of a Caribbean wedding was less than $10 000. Listed below is the total cost (in $ thousands) for a sample of eight Caribbean weddings:

a. State the null hypothesis and the alternate hypothesis. (Enter the final answers in thousands of dollars.)

H₀: μ ≥           

H₁: μ <           

b. State the decision rule for 0.05 significance level. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Reject H₀ if t <            .

c. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Value of the test statistic           

d. At the 0.05 significance level, is it reasonable to conclude the mean wedding cost is less than $10,000 as advertised?

(Click to select)  Reject  Do not reject  H₀. There is  (Click to select)  enough  not enough  evidence to conclude that the cost is less than $10,000.

5) nxt qustn

A shopping centre wants to examine the amount of space required for parking. Studies indicated that 62% of staff and shoppers use public transportation. A survey of 1,002 was taken, and 560 responded that they used public transportation.

a. State the null hypothesis and the alternate hypothesis. Round the final answers to 2 decimal places.

H₀: p =           

H₁: p ≠            

b. State the decision rule for 0.05 significance level. (Negative answer should be indicated by a minus sign. Round the final answers to 2 decimal places.)

Reject H₀ if z >   or z <  .

c. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 2 decimal places.)

Value of the test statistic            

d. At the 0.05 significance level, is it reasonable to conclude that the survey results indicate a change?

(Click to select)  Do not reject  Reject  H₀. There is  (Click to select)  enough  not enough  evidence to indicate that the results have changed.

The cost of a wedding has skyrocketed in recent years. As a result, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised that the cost of a Caribbean wedding was less than $10 000. Listed below is the total cost (in $ thousands) for a sample of eight Caribbean weddings:

a. State the null hypothesis and the alternate hypothesis. (Enter the final answers in thousands of dollars.)

H₀: μ ≥           10 10 Correct

H₁: μ <           10 10 Correct

b. State the decision rule for 0.10 significance level. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Reject H₀ if t <            Not attempted .

c. Compute the value of the test statistic. (Negative answer should be indicated by a minus sign. Round the final answer to 3 decimal places.)

Value of the test statistic           -0.133 -0.133 Incorrect

d. At the 0.10 significance level, is it reasonable to conclude the mean wedding cost is less than $10,000 as advertised?

Do not reject  CorrectH₀. There is not enough  Correctevidence to conclude that the cost is less than $10,000

The cost of equipment purchased by Sheffield, Inc., on June 1, 2020, is $100,800. It is estimated that the machine will have a $8,400 salvage value at the end of its service life. Its service life is estimated at 7 years, its total working hours are estimated at 46,200, and its total production is estimated at 660,000 units. During 2020, the machine was operated 7,080 hours and produced 64,900 units. During 2021, the machine was operated 6,490 hours and produced 56,600 units. Compute depreciation expense on the machine for the year ending December 31, 2020, and the year ending December 31, 2021, using the following methods. (Round depreciation per unit to 2 decimal places, e.g. 15.25 and final answers to 0 decimal places, e.g. 45,892.) 2020 2021 (a) Straight-line $ $ (b) Units-of-output $ $ (c) Working hours $ $ (d) Sum-of-the-years'-digits $ $ (e) Double-declining-balance (twice the straight-line rate) $ $

During April, the first production department of a process manufacturing system completed its work on 350,000 units of a product and transferred them to the next department. Of these transferred units, 70,000 were in process in the production department at the beginning of April and 280,000 were started and completed in April. April's beginning inventory units were 60% complete with respect to materials and 40% complete with respect to conversion. At the end of April, 92,000 additional units were in process in the production department and were 85% complete with respect to materials and 35% complete with respect to conversion.

The production department had $1,062,050 of direct materials and $750,904 of conversion costs charged to it during April. Also, its beginning inventory of $210,036 consists of $158,320 of direct materials cost and $51,716 of conversion costs.

1. Compute the direct materials cost per equivalent unit for April. (Round "Cost per EUP" to 2 decimal places.)
2. Compute the conversion cost per equivalent unit for April. (Round "Cost per EUP" to 2 decimal places.)
3. Using the FIFO method, assign April’s costs to the department’s output—specifically, its units transferred to the next department and its ending work in process inventory. (Round "Cost per EUP" to 2 decimal places.)

The Toyota Camry is one of the best-selling cars in North America. The cost of a previously owned Camry depends on many factors, including the model year, mileage, and condition. To investigate the relationship between the car’s mileage and the sales price for Camrys, the following data show the mileage and sale price for 19 sales (PriceHub web site, February 24, 2012).

The cost of controlling emissions at a firm goes up rapidly as the amount of emissions reduced goes up. Here is a possible model: C(x, y) = 1,000 + 200x2 + 200y2 where x is the reduction in sulfur emissions, y is the reduction in lead emissions (in pounds of pollutant per day), and C is the daily cost to the firm (in dollars) of this reduction. Government clean-air subsidies amount to $100 per pound of sulfur and $200 per pound of lead removed. How many pounds of pollutant should the firm remove each day to minimize net cost (cost minus subsidy)?

The management of Penfold Corporation is considering the purchase of a machine that would cost $300,000, would last for 5 years, and would have no salvage value. The machine would reduce labor and other costs by $70,000 per year. The company requires a minimum pretax return of 12% on all investment projects.

Click here to view Exhibit 13B-1 and Exhibit 13B-2 to determine the appropriate discount factor(s) using the tables provided.

The net present value of the proposed project is closest to (Ignore income taxes.)