An Educational Organization in California Is Interested in Estimating the Mean

question 23

Multiple Choice

An educational organization in California is interested in estimating the mean number of minutes per day that children between the age of 6 and 18 spend watching television per day. A previous study showed that the population standard deviation was 21.5 minutes. The organization selected a random sample of n = 200 children between the age of 6 and 18 and recorded the number of minutes of TV that each person watched on a particular day. The mean time was 191.3 minutes. If the leaders of the organization wish to develop an interval estimate with 95 percent confidence, what will the margin of error be?

• A) Approximately ±1.52 minutes
• B) About ±2.98 minutes
• C) z = 1.96
• D) Approximately ±42.14 minutes

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Definitions:

Digestive System

The group of organs responsible for breaking down food, absorbing nutrients, and eliminating waste.

Pancreatic Juices

Digestive fluids produced by the pancreas that contain enzymes to help break down carbohydrates, proteins, and fats.

Bile

A digestive fluid produced by the liver and stored in the gallbladder, involved in the digestion of fats.

Small Intestine

A long, coiled part of the digestive system where most of the digestion and absorption of nutrients occurs.