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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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A vessel operator is involved in an accident where someone requires medical attention beyond simple first aid. how long does the
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The answer is: 48 hours
If the vessel operator is knowingly aware of the situation and decided not to file a written report for the victim, the vessel operator will be exposed to several risk of crime if the wound managed to took the victim's life because the court will seem him/her as responsible in the death
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Emarpy Appliances Inc. wants to determine the optimal production policy for their best selling refrigerator. The demand for this
monitta

Answer:

Q' = 213.80

Explanation:

P(d): production rate per day = 200

Ic: Installation cost = 120

D: Demand = 8000

D(d): demand rate per day = 32

Uc: Unit cost (holding) = 50

Applying into Production order quantity model formula

Q'= \sqrt{\frac{2*D*Ic}{(1 - \frac{D(d)}{P(d)}) * Uc } }  = \sqrt{\frac{2*8000*120}{(1 - \frac{32}{200})*50 } }  = 213.80

7 0
2 years ago
Ian would like to save $2,000,000 by the time he retires in 30 years. if he believes that he can achieve a 6% rate of return, ho
klio [65]
The future worth of the periodic payment, in this case, annual, can be calculated through the equation,

    FV = P x ((1 + r)^n - 1)/ r))

where FV is the future value, P is the periodic payment, r is the interest rate, and n is the number of years. Substituting the known values,

   2,000,000 = P x ((1 + 0.06)^30 - 1)/ 0.06))

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Hence, the answer to this item is the fourth choice. 
7 0
2 years ago
On January 1, 2020, CORONVS Inc. acquired a machine for $1,000,000. The estimated useful life of the asset is 5 years. The resid
Elenna [48]

Answer:

The book value of the machine at the end of 2021 is $620000.

Explanation:

The straight line depreciation allocates a constant depreciation expense throughout the useful life of the machine. The straight line depreciation expense can be calculated using the following formula,

Depreciation expense per year = (Cost - Residual value) / estimated useful life

Depreciation expense per year = (1000000 - 50000) / 5  = $190000 per year

The book value of asset is the value of the asset calculated by deducting Accumulated depreciation from its cost.

The book value of the machine at the end of 2021 will be the, considering the depreciation expense for year 2021 has been charged,

Accumulated depreciation till 2021 end = 190000 for Year 2020 + 190000 for Year 2021  =  $380000

Book value at the end of 2021 = 1000000 - 380000 = $620000

8 0
2 years ago
Fran is the project manager in her organization. She reports to a PMO (project management office) that takes control of the proj
WINSTONCH [101]

Answer:

Directive PMO

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A project management office(PMO) refers to creation of groups and departments within an organization so as to define standards and to ensure those standards are met.

In a directive form of project management office, it completely takes over projects and allots resources, and assigns project managers to projects.

In such a form of Project management office, the project managers are supposed to report to such directive offices.

In the given case, since Fran reports to such a PMO form which assumes control of the projects and manages the project, this is a directive form of project management.

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2 years ago
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