A Researcher Wants to Estimate the Difference in the Means

question 10

Multiple Choice

A researcher wants to estimate the difference in the means of two populations.A random sample of 36 items from the first population results in a sample mean of 430.A random sample of 49 items from the second population results in a sample mean of 460.The population standard deviations are 120 for the first population and 140 for the second population.From this information, a 95% confidence interval for the difference in population means is ___.

• A)-95.90 to 35.90
• B)-85.44 to 25.44
• C)-76.53 to 16.53
• D)-102.83 to 42.43
• E)98.45 to 125.48

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Definitions:

Chronic Toxicity

The adverse health effects resulting from long-term exposure to a toxic substance or agent.

Synthetic Mimics

Artificial substances or materials that replicate or imitate the functions and properties of natural substances.

Endocrine System

A network of glands in the body that produce and release hormones directly into the blood, controlling various bodily functions.

Circulatory System

The body system responsible for the transport of blood, nutrients, oxygen, carbon dioxide, and hormones throughout the body, comprising the heart and blood vessels.