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horsena [70]
2 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]2 years ago
7 0

Answer:

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Answer:

B. The total interest = $4.35

Explanation:

The first question to answer, is  what is the present value of the annuity of the loan and then based on that the total interest can be calculated.

<h2>Present value of annuity= A x [(1-(1+r)-n)/r]*(1+r) </h2>

Where the A represents Annuity = or $20

The r represents the rate or 1.5%

and the n represents the number of periods which is 6 months

Calculating the value =

= 20 x [(1-1.015^-6)/0.015]*1.015

= 20 x [(1-0.91454219251)/0.015]*1.015

= 20*5.782644973

=$115.65

Now that the loan amount is known, the Total Interest can be calculated as follows

Total Interest= number of payments x monthly payments) - the loan amount (calculated above)

= 20 x 6 -115.65

= 120-115.65

The total interest = $4.35

8 0
3 years ago
Which of the following is NOT considered to be one of the main revenue centers at most financial institutions?
Aleks [24]

Answer:

money and credit markets,investments,financial management

Explanation:

Finance consists of three interrelated areas: (1) money and credit markets, which deals with the securities markets and financial institutions; (2) investments, which focuses on the decisions made by both individuals and institutional investors; and (3) financial management, which involves decisions made within the ...

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2 years ago
Jamie is 42 years old and received a $20,000 distribution for his roth ira established in 2009. at the time of distribution, the
Leviafan [203]
<span>The rules for the Roth early distribution are as follows : Unless an exception applies, most distributions from a Roth IRA before the owner reaches age 59 1/2 will be subject to an "early withdrawal penalty" of 10% on the amount of the distribution. This is IF a person has kept the amount in the account for his required five year tax period rule. If this condition has been met, the total penalty would be $ 2000.00</span>
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3 years ago
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adelina 88 [10]

This is also known as the three duties towards the customer DAD Dealing with Honesty. Accounting for all funds and Disclosing the material facts to the buyer.

<h3>Who is a buyer?</h3>

A buyer is a customer who purchases the goods and or services of a company through which the company generates the revenue and earn profits. The buyer plays a key role in the development and running of a company.

The buyer should be allowed to have all the information about the product or service it is going to purchase, the buyer should be informed about the market rates and the demand of the goods as this is a material fact about the product.

Therefore it is a duty that a seller owes to the buyer to deal with honesty that is not charging high price if they are unaware of the price of the product.

Learn more about Buyer at brainly.com/question/27282505

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7 0
1 year ago
Mr. Brown is in the 10 percent federal income tax bracket and wants to invest $10,000 in interest-earning assets. Mr. Black is i
snow_lady [41]

Based on the information given, the corporate bond will be recommended for Mr. Brown while the municipal bond will be recommended for Mr Black.

<u>Mr Brown:</u>

The after-yield tax on corporate bonds will be:

= Before tax yield × (1 - tax rate)

= 4% × (1 - 0.10)

= 3.60%

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= 3.5% × 1 = 3.5%

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For <u>Mr. Black</u>

The after-yield tax on corporate bonds will be:

= 4% × (1 - 0.35)

= 2.60%

The after-yield tax on municipal bonds will be:

= 3.5% × 1

= 3.5%

Therefore, the municipal bond is recommended.

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brainly.com/question/25379770

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2 years ago
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