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marissa [1.9K]
4 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]4 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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If a special sales order is accepted for​ 8,100 widgets at a price of​ $39 per​ unit, and fixed costs increase by​ $13,000, how
Lana71 [14]

Answer:

D) Increase by $68,000

Explanation:

The computation of change in the operating income is shown below:

Sales ( 8,100 widgets × $39) $315,900

Less: Variable cost (8,100 widgets × $29) ($234,900)  

Contribution margin $81,000

Less: Increase in fixed assets -$13,000

Net income increased              $68,000

We simply applying the above format so that the change in the operating income could be find out. Since the net income is in positive so it shows an increment

8 0
3 years ago
Sarah's house caught on fire. Through the prompt assistance of her neighbor Odessa, the fire was quickly extinguished. In gratit
Zepler [3.9K]

Answer:

To enforce this promise we need to analyse whether there has been any agreement or contract between Sarah and Odessa and whether the same can be enforced.

Explanation:

In Sarah's case, her offer to gratuitously pay the neighbor for assisting in the house fire is not an enforceable contract. When the neighbor rushed to help in the fire, the offer to pay $1,000 had not yet been extended. When Sarah did extend the offer to pay $1,000, there was no consideration exchanged between both parties. The consideration, putting out the fire, had already occurred without the offer or acceptance of a contract.

Consider an alternate scenario. Sarah's house was on fire, and she could not wait for the fire department. She ran to her neighbor's house, begged for help, and offered $1,000 in exchange for neighbor's assistance. After hearing Sarah's plea, the neighbor agrees to assist in extinguishing the fire. This constitutes a contract; an offer, consideration, and acceptance.

3 0
3 years ago
Sam has contracted with Dave to purchase Dave's racing bike, with payment and delivery of the bicycle to be made 10 days after t
bonufazy [111]

Answer: Immediately seek injunctive relief.

Explanation:

An injunctive relief is an order by the court stopping an action from taking place. From the question, we are told that Sam has contracted with Dave to buy Dave's racing bike, with payment and delivery of the bicycle to be made 10 days after the contract was made.

We are further told that three days later Sam hears that Dave is going to sell the bike to Gene in three days at a higher price. If Sam really wants the bike, he should seek injunctive relief. By doing so, the court will stop Dave from selling the bike to Gene.

3 0
4 years ago
Changes in the equilibrium interest rate will Group of answer choices . affect both the size of the domestic output and the allo
vodomira [7]

Answer:

Changes in the equilibrium interest rate

  • affects both the size of the domestic output and the allocation of capital goods among industries.

Explanation:

Changes in interest rates affects the demand for goods and services and, thus, aggregate investment spending. A decrease in interest rates lowers the cost of borrowing, which encourages industries to increase investment spending.  

The aggregate demand is determined by consumption demand and investment demand. When the rate of interest falls the level of investment increases and vice versa

An increase in the equilibrium interest rate affects demand for money. This increase in demand raises the equilibrium interest rate.

Households and businesses then try to decrease their cash holdings by purchasing bonds affecting both the size of the domestic output and the allocation of capital goods among industries.

The equilibrium interest rate changes with the economy and monetary policy.

6 0
3 years ago
Darren has developed a better type of medication vial for travelers. He is not sure how to develop a marketing program for his p
harina [27]

Answer:

The answer is: keyword analysis

Explanation:

Keyword analysis refers to the process of analyzing search phrases or specific keywords that leads visitors to a company's website, either through organic or paid search. Keyword analysis is the starting point or search marketing.

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3 years ago
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