A Group of Statistics Students Decided to Conduct a Survey

question 20

Multiple Choice

A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students study per week. Based on a simple random sample, they surveyed 144 students. The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours. What is the probability of finding a sample mean less than 18 hours?

• A) 0.4820
• B) 0.4918
• C) 0.0082
• D) 0.0181

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Definitions:

Parenteral Nutrition

A technique which involves supplying nutrients directly into the bloodstream via an intravenous solution, avoiding the gastrointestinal tract altogether.

Blood Glucose Monitoring

The process of testing the concentration of glucose in the blood, crucial for managing diabetes and ensuring optimal blood sugar levels.

Refrigerated

The state of being kept cool in a fridge to preserve freshness or prevent spoilage.

Intravenous Medications

Drugs delivered directly into the bloodstream via a vein to achieve rapid and efficient absorption and action.