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marissa [1.9K]
3 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]3 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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Investing in stocks and bonds is risky because it is possible to lose all or part of your principal.
Aneli [31]

It's true investing in stocks and bonds is risky because it is possible to lose all or part of your principal.

Investors are unlikely to demand the same returns on their stock investments year after year. Market yields can be expressed as the sum of government bond yields and market risk premiums.

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8 0
2 years ago
Which of these is not a cost of quality?
ollegr [7]

The correct option is (c). Design cost  is not a cost of quality.

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As a component of cost management strategies, design-to-cost refers to a methodical strategy for reducing the costs associated with product development and manufacturing. The fundamental tenet is that expenses are hard to avoid once they are "built into the product," even from the first concept judgments on.

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8 0
1 year ago
Roth Service Co. experienced the following transactions for 2018, its first year of operations: Provided $80,000 of services on
Stels [109]

Answer and Explanation:

a. The preparation of income statement is shown below:-

                               Income Statement

Service revenue                               $80,000

operating expenses  

Salary expenses           $28,000

Uncollectible accounts

expense                        $3,273

Total operating expense                   $31,273

Net income                                         $48,727

Working Note :-

Days       Amount     Percentage     Allowance balance

Current   $16,800       0.01                  $168

0-30         $5,100        0.05                 $255

31-60       $4,000        0.10                  $400

61-90       $2,000        0.30                 $600

Over 90

days         $3,700       0.50                  $1,850

Total        $31,600                                $3,273

b. The computation of net realizable value of the accounts receivable is shown below:-

Net realizable value = Accounts receivable - Allowance for doubtful accounts

= ($80,000 - $48,400) - $3,273

= $31,600 - $3,273

= $28,327

4 0
2 years ago
Air France collected cash on February 4 from the sale of a ticket to a customer on January 26. The flight took place on April 5.
expeople1 [14]

Answer:

Air France should have recognized the Revenue in month of  APRIL.

Explanation:

According to the revenue recognition concept the revenue should be recognized when it is realizable. When goods or services are tranferred or rendered to the customer. It doesn't matter matter when the payment is received. Payment received in advance should be recorded as unearned revenue rather as revenue. On the other hand payment doesn't received until the transfer of goods or services, a receivable will be made in result of revenue recognition entry. Air France should recognize the revenue on April 5, when the flight took placed and services are performed. Sale of ticked on January 26 will be recorded as unearned revenue and a receivable on the other hand. The receivable will be adjusted on February 4 when cash is received and the revenue will be recognized on April 5 when flight took place.

7 0
3 years ago
Assume Zap industries reported the following adjusted account balances at year-end. 2019 2018 Accounts Receivable $ 1,690,200 $
Scrat [10]

Answer:

amount of Bad Debt Expense for 2019 = $92,000

Explanation:

A bad debt expense is a uncollectible receivable amount incurred on a credit sale to a customer, who is no longer able to pay the debt, due to bankruptcy or other financial problems. Companies make provision for these kind of credit losses in the allowance for doubtful accounts, and hence records the amount used from the allowance for doubtful accounts as the bad debt expense.

In our example, the allowance for doubtful account for 2019 is $92,000, hence since it was used to settle part of the credit losses, this becomes the bad debt expense.

3 0
3 years ago
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