"A new asset is available for $236,000. O&M costs are $10,000 each year for the first five years, $13,300 in year six, $19,300 in year seven, and $28,800 in year eight. Salvage values are estimated to be $144,000 after one year and will decrease at the rate of 49% per year thereafter. At a MARR of 10%, determine the economic service life of the asset. Enter your answer as an integer from 1 to 8."

Answer is 8

The purpose of this study was to evaluate the effects of Matricaria recutita extract (the active ingredient in chamomile tea) on sleep quality, fatigue, and depression in postpartum women. Sleep quality is a significant issue for women after childbirth and chamomile is widely used as a folk remedy for its presumed sedative-hypnotic effects. A total of 80 Taiwanese postnatal women, aged 25-35 with poor sleep quality were recruited from November 2012-August 2013. They were randomly assigned to one of two possible groups of 40 people each. The participants in Group 1 were instructed to drink M. recutita extract (540mg/day)) daily for a period of 2 weeks. The participants in Group 2 received regular postpartum care only. The Postpartum Sleep Quality Scale (PSQS), Edinburgh Postnatal Depression Scale, and Postpartum Fatigue Scale were used to assess sleep quality, fatigue, and depression with higher scores indicating poorer outcomes. Compared with Group 2, Group 1 demonstrated significantly lower scores of physical-symptoms-related sleep inefficiency (t = -2·482, P = 0·015) and the symptoms of depression (t = -2·372, P = 0·020). Chamomile tea may be recommended to postpartum women as a supplementary approach to alleviating depression and sleep quality problems.

Question 6:

What type of study design was this? (4 points)

Question 7:

List two advantages and two disadvantages of this type of study design. (8 points)

The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of  business travelers is selected and each traveler is asked to provide a rating for the Miami International Airport. The ratings obtained from the sample of  business travelers follow.

Develop a  confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places.

( ,  )

1). Which predictor variables are statistically significant at the 10% significance level?

2). What is the slope and p-value of the bedrooms variable?

3). What percentage of the variability in price is explained by this model?

Please explain answer and show steps

Which two statements describe the IP address 10.16.3.65/22? (Choose two)

1. The subnet address is 10.16.3.0 255.255.252.0.
2. The lowest host address in the subnet is 10.16.0.1 255.255.252.0.
3. The last valid host address in the subnet is 10.16.3.255 255.255.252.0
4. The broadcast address of the subnet is 10.16.3.255 255.255.252.0.
5. The network is not subnetted.

Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three)

1. 10.1.169.0
2. 10.1.176.1
3. 10.1.175.254
4. 10.1.160.0
5. 10.1.175.255
6. 10.1.160.255

Which one of the following IP addresses is the last valid host in the subnet using mask 255.255.255.192?

1. 192.168.2.60
2. 192.168.2.61
3. 192.168.2.62
4. 192.168.2.63
5. 192.168.2.32

An administrator is working with the 192.168.4.0 network, which has been subnetted with a /27 mask. Which two addresses can be assigned to hosts within the same subnet? (Choose two)

1. 192.168.4.30
2. 192.168.4.31
3. 192.168.4.32
4. 192.168.4.33

In the year 2005, in Anytown, suppose that one person is willing to pay $1,000 for relief from hay fever; another two are willing to pay $350; about five more are willing to pay $50; one is willing to pay $40; one is willing to pay $35; one each is willing to pay $34, $32, $30, and $28; about a dozen are willing to pay $10; four are willing to pay $5; and half of the rest of the town (another 75 people) are willing to pay $1. a. Draw the demand curve for hay fever relief in Anytown. b. What is the potential total benefit (total of incremental value) from relief of hay fever if it is provided to everyone who asks? To everyone willing to pay $35 or more? c. If the price of hay fever medication is $20, what is the quantity demanded? What is the consumer surplus (total net value or benefit) for those who are willing and able to pay for the hey fever medication?

HW Measuring Total Output & Income

                                    A                                              B          
GDP ($millions)                       1000000          1050400          250000            288000
population (millions)                20                    20.2                 50                    60
GDP/pop ($thousands)          50,000__          52,000__          5,000 __          4,800 __

Economy A is a developed economy while B is a developing economy. Both are observed above at two points in time.                                                               
1)Which economy is bigger? A
2)Which economy grew? (both, neither, A, B) Both
3)Which economy added more output? 
4)Which economy had greater percentage growth?
5)Which has more people? B
6)Which population grew? (both, neither, A, B) Both grew but B grew more (50 to 60)
7)Which population had greater percentage growth?
8)Which had GDP per capita growth? (both, neither, A, B)   A
9)Which had more per capita? A

Pizzeria Duo Express sells two type of pizzas; regular and deluxe. The company sells each regular pizza for $7 and each deluxe pizza for $10. The firm currently has 150 pounds of dough mix and 50 pounds of topping mix. Accounting reports that the current amounts of dough and topping mix have a value of $300 and $125, respectively. Each regular pizza uses 1 pound of dough mix and 4 ounces (16 ounces= 1 pound) of topping mix. Each deluxe pizza uses 1 pound of dough mix and 8 ounces of topping mix. Based on the past demand per week, Bryant can sell at least 50 regular pizzas and at least 25 deluxe pizzas, on a regular day.

A. Formulate the standard form of this model.

B. Determine the number of regular and deluxe pizzas the company should make to maximize net income, each day.

Nationally, about 11% of the total U.S. wheat crop is destroyed each year by hail.† An insurance company is studying wheat hail damage claims in a county in Colorado. A random sample of 16 claims in the county reported the percentage of their wheat lost to hail.

The sample mean is x = 12.2%. Let x be a random variable that represents the percentage of wheat crop in that county lost to hail. Assume that x has a normal distribution and σ = 5.0%. Do these data indicate that the percentage of wheat crop lost to hail in that county is different (either way) from the national mean of 11%? Use α = 0.01.

(a) What is the level of significance?


State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test?

H₀: μ ≠ 11%; H₁:  μ = 11%; two-tailedH₀: μ = 11%; H₁:  μ > 11%; right-tailed     H₀: μ = 11%; H₁:  μ < 11%; left-tailedH₀: μ = 11%; H₁:  μ ≠ 11%; two-tailed

(b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution.

The standard normal, since we assume that x has a normal distribution with known σ.The Student's t, since n is large with unknown σ.     The standard normal, since we assume that x has a normal distribution with unknown σ.The Student's t, since we assume that x has a normal distribution with known σ.

Compute the z value of the sample test statistic. (Round your answer to two decimal places.)


(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)


Sketch the sampling distribution and show the area corresponding to the P-value.

(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level α?

At the α = 0.01 level, we reject the null hypothesis and conclude the data are statistically significant.At the α = 0.01 level, we reject the null hypothesis and conclude the data are not statistically significant.     At the α = 0.01 level, we fail to reject the null hypothesis and conclude the data are statistically significant.At the α = 0.01 level, we fail to reject the null hypothesis and conclude the data are not statistically significant.

(e) State your conclusion in the context of the application.

There is sufficient evidence at the 0.01 level to conclude that the average hail damage to wheat crops in the county in Colorado differs from the national average.There is insufficient evidence at the 0.01 level to conclude that the average hail damage to wheat crops in the county in Colorado differs from the national average.    

Empire Electric Company (EEC) uses only debt and common equity. It can borrow unlimited amounts at an interest rate of r_d = 9% as long as it finances at its target capital structure, which calls for 45% debt and 55% common equity. Its last dividend (D₀) was $2.75, its expected constant growth rate is 6%, and its common stock sells for $30. EEC's tax rate is 40%. Two projects are available: Project A has a rate of return of 12%, and Project B's return is 11%. These two projects are equally risky and about as risky as the firm's existing assets.

1. What is its cost of common equity? Round your answer to two decimal places. Do not round your intermediate calculations.
   %
2. What is the WACC? Round your answer to two decimal places. Do not round your intermediate calculations.