Instruction 10-7 To Investigate the Efficacy of a Diet, a Random Sample

question 158

Short Answer

Instruction 10-7
To investigate the efficacy of a diet, a random sample of 16 male patients is drawn 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 kilograms with the standard deviation of differences computed as 6.0 kilograms.
-Referring to Instruction 10-7,the t test should be __________-tailed.

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Definitions:

Net Sales

The total revenue generated from sales after deducting returns, allowances for damaged or missing goods, and discounts.

Semiannually

Occurring twice a year, typically used in the context of payments, interest calculations, or periodic events.

Average Inventory

The mean value of inventory held by a business over a specific period of time, used to evaluate the investment in inventory against sales performance.

Ending Inventory

The complete valuation of items that are up for sale at the end of a financial accounting period.