TABLE 10-6 To Investigate the Efficacy of a Diet, a Random Sample

question 57

Short Answer

TABLE 10-6
To investigate the efficacy of a diet, a random sample of 16 male patients is selected from a population of adult males using the diet. The weight of each individual in the sample is taken at the start of the diet and at a medical follow-up 4 weeks later. Assuming that the population of differences in weight before versus after the diet follow a normal distribution, the t test for related samples can be used to determine if there was a significant decrease in the mean weight during this period. Suppose the mean decrease in weights over all 16 subjects in the study is 3.0 pounds with the standard deviation of differences computed as 6.0 pounds.
-Referring to Table 10-6, there are ________ degrees of freedom for this test.

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Definitions:

Percentage-of-Receivables Basis

A method used to estimate the amount of bad debt expense by applying a fixed percentage to the total amount of accounts receivable.

Allowance for Doubtful Accounts

A contra-asset account used to estimate the portion of a company's receivables that may not be collectible.

Bad Debt Expense

An expense reported on the income statement, representing the amount of non-collectible accounts receivable during a period.

Direct Write-off Method

An accounting method where bad debts are expensed only when they are deemed uncollectible.