Suppose a Research Firm Conducted a Survey to Determine the Mean

question 13

Multiple Choice

Suppose a research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. A sample of 100 steady smokers revealed that the sample mean is $20. The population standard deviation is $5. What is the probability that a sample of 100 steady smokers spend between $19 and $21?

• A)0.4772
• B)0.0228
• C)0.9544
• D)1.0000

---

Definitions:

Unpredictable Responses

Reactions or outcomes that cannot be predicted based on current knowledge or typical patterns.

Adverse Effects

Undesirable outcomes or reactions caused by a medication, treatment, or intervention.

Physiological Response

The body's natural reaction to a specific stimulus or condition, such as temperature changes, exercise, or stress.

Therapeutic Effect

The beneficial outcomes or intended effects of a treatment or medication on a patient's condition or symptoms.