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marissa [1.9K]
2 years ago
12

Concussions and Brain Size A recent study1 examined the relationship of football and concussions on hippocampus volume in the br

ain. The study included three groups with in each group: healthy controls who had never played football, football players with no history of concussions, and football players with a history of concussions. In this exercise, we test for evidence that average brain size is larger in football players who have never had a concussion (FBNoConcuss) than in football players with a history of concussions (FBConcuss). The data are in FootballBrain where the variable Hipp measures brain size as the volume of the hippocampus (in ml) for each subject. Let group be the football players with no concussion and group be the football players with a history of concussions.

Business
1 answer:
Gwar [14]2 years ago
5 0

Answer:

Part A: Null hypothesis. H₀: M₁ = M₂

Alternative hypothesis, H₁ : M₁ > M₂

Part B: x1-x2 = 6459-5735 = 724

Part C: p-value = 0.000

Part D: No, the difference in brain size is not due to random chance

Explanation:

See attached image

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Reese, a calendar-year taxpayer, uses the cash method of accounting for her sole proprietorship. In late December, she received
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Answer:

$11,560

$5666.661

Explanation:

Given the following :

Bill received from accountant = $17,000

This year's marginal tax rate = 32%

Next year's marginal tax rate = 37%

After tax return on investment = 11%

After tax cost of bill is paid in December :

Billed amount * this year's tax rate

$17,000 * ( 1 - 0.32)

= $17,000 * 0.68

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B) After tax cost of bill was paid in January:

Billed amount * next year's tax rate * PV factor

From the present value factor table;

PV factor (1 years, 11%) = 0.9009

Hence,

$17,000 * 0.37 * 0.9009 = $5666.661

4 0
1 year ago
Acme inc. has a mission statement that is open to interpretation. many stakeholders identify with it. their mission statement is
shtirl [24]
Thank you for posting your question here at brainly. I hope the answer will help. The mission statement "Acme inc. has a mission statement that is open to interpretation. Many stakeholders identify with it." is <span>ambiguous.</span>
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2 years ago
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Suppose a mutual fund yielded a return of 14% last year. The risk-free rate was 5% last year and the stock market return was 10%
Makovka662 [10]

Answer:

Beta is 1.8

Explanation:

CAPM or capital asset pricing model is used to compute expected return on stock by establishing relationship between expected returns and systematic risk (also called beta).

Given:

Return on mutual fund = 14%

Risk free rate (Rf) = 5%

Market return (Rm) = 10%

Risk premium = Rm - Rf

                      = 10% - 5%

                      = 5%

CAPM formula:

Returns = Rf + β(Rp)

14% = 5% + β(5%)

β = 9 / 5

β = 1.8

Beta of mutual fund is 1.8

4 0
2 years ago
Country Talmar produces​ 100,000 cars during a particular year. The market price of cars in Talmar is​ $5,000. In a recent meeti
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Answer:

e. There is a deadweight loss at the given production level.

Explanation:

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1 year ago
Assume you own and operate a small printing and specialty advertising business that employs 25 persons. With increased health ca
vladimir2022 [97]

Answer:

The answer is C.  Safety and security needs

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