1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horsena [70]
3 years ago
15

Left ventricular mass (LVM), determined from echocardiograms, is an important risk factor for subsequent cardiovascular disease.

The researchers are interested in assessing whether LVM changes in children over a 4-year period. To help plan the main study, a pilot study is conducted where echocardiograms are obtained from 10 random children from the Bogalusa Heart Study at baseline and after 4 years of follow-up. The sample mean of LVM change over the 4-year study period is 18.9 g and the sample standard deviation is 26.4 g. For answering the questions (a) and (b) below, assume that the sample variance of LVM change in this pilot study is the true variance of LVM change in the population.(a). If the expected increase in LVM is 10 g, what is the power of such a study if a two-sided test is to be used with α = 0.05? (b). Since this is a pilot study, the main question of interest is how many subjects would be needed to detect an increase of 10 g in mean LVM over 4 years using a two-sided test with α = 0.05 and power = 80%? Suppose the researchers also want to get an idea of the true population variance σ 2 of LVM change in children over a 4-year period based on the pilot data. (c). Perform a hypothesis test to assess whether σ 2 is significantly different from 300. Use both critical-value and p-value methods. (d). Find a 95% confidence interval (CI) of σ 2 . Is the result consistent with that of (c)? Justify your answer.
Business
1 answer:
polet [3.4K]3 years ago
7 0

Answer:

jfggcktifylfykcycykvv

You might be interested in
Crane Company sells 50000 units for $10 a unit. Fixed costs are $350000 and net income is $100000. What should be reported as va
koban [17]

Answer:

Variable expenses = $50,000

Explanation:

Given:

Sales price = 50,000 x $10 = $500,000

Fixed costs = $350,000

Net income = $100,000

Find:

Variable expenses

Computation:

Variable expenses = Sales price - Fixed costs - Net income

Variable expenses = $500,000 - $350,000 - $100,000

Variable expenses = $50,000

5 0
3 years ago
Why is it difficult for most small business owners to raise the capital needed to start, operate, or expand their ventures?
Andre45 [30]

Answer:

1. It is not easy to get funds for a start up, as many banks do not consider it as a successful decision to provide loan to a start up, as the feasibility of recovery of loan cannot be identified and guaranteed.

2. Venture capitalists also faces the same issue as of bank, also they are large equity investors and tend to invest in even larger project.

3. Private investors do not blindly invest and rather are more cautious then banks or venture capitalists, as because they do not huge funds to invest, and with less amount of investment they need even higher assurance.

4. Public stock is never available for a start up as for public stock issue you need great credibility, and good previous record.

4 0
3 years ago
Using the word “CAPITALISM,” create an acrostic poem that demonstrates your understanding of the term. Feel free to come back an
pogonyaev

Answer:

Capitalism is an economic system based on investing money in the expectation of making a profit. The means of production are usually privately owned by private entrepreneurs who often use wage labor to create added value. In doing so, they enjoy a great deal of legal freedom to dispose of these means, free enterprise production. This freedom also means that there is competition, which means that entrepreneurs have an interest in increasing the efficiency of their company. Hence, the capital owner will not fully consume the profit but reinvest in the business and capital accumulation takes place. The distribution of products is regulated by the market, in which the role of the government is, in principle, limited to that of market master.

6 0
2 years ago
The accounting offices of anna and elsa ice are linked in a network that allows employees to choose who they will send informati
kumpel [21]
A network switch I hope this helps sorry if I'm wrong
6 0
3 years ago
Read 2 more answers
Toronto-based Mercedes-Benz Canada, with a network of 55 dealers, did not know enough about its customers. Dealers provided cust
frutty [35]

<u>Explanation:</u>

Mercedes-Benz adopts a method where the dealers are the only contact with the customers and company has failed to communicate with the customers directly.

Customer Relationship Management (CRM) is a tool that can be utilized by the company for easier day to day work. The information can be kept up to date which is easy to import, export and apply statistics to find information. The information can be accessed by Mercedes from anywhere. It helps to connect with the customers.

Another tool Partner Relationship Management (PRM) is used to connect with partners. The tasks can be scheduled and performance can be managed. Information and report details can be shared with the help of CRM and PRM from dealers and partners with Mercedes.

6 0
3 years ago
Other questions:
  • Why might vertical systems be a business ethics issue? ?
    11·1 answer
  • Professor Green teaches environmental economics at the local university. Students learn that the professor has also written book
    11·1 answer
  • Simplify (7^5)^3 <br><br>A)(1/7)^15<br>B)35^3<br>C)7^15<br>D)7^8
    15·2 answers
  • For the person to whom this utility function applies, a. her level of satisfaction will be enhanced equally by an increase in we
    6·1 answer
  • The State of Adaven issued $50 million of perpetual bonds in 1990. The bonds were issued in $100 denominations with an annual co
    5·1 answer
  • Click this link to view the OOH educational information for Roofers. According to the OOH, what are some educational, training,
    13·2 answers
  • To determine if the bank's Web site is secure, look at the web site address.<br><br> True<br> False
    10·1 answer
  • Real property is real estate owned by individuals and businesses.<br><br><br> t or f
    6·1 answer
  • ______ is a nonprofit organization that recruits and selects college graduates from universities to serve as teachers in low-inc
    11·1 answer
  • Last quarter, a retailer sold 8,000 T-shirts, 7,000 of which were sold directly from on-hand inventory. This retailer's ________
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!