Use the Following Information to Answer the Question $110.0 \pm 8.5$

question 17

Multiple Choice

Use the following information to answer the question. A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The mean finish time of all participants in a recent large duathlon was 1.67 hours with a standard deviation of 0.25 hours. Suppose a random sample of 30 participants was taken and the mean finishing time was found to be 1.59 hours with a standard deviation of 0.30 hours.
-The weights at birth of five randomly chosen baby giraffes were 111, 115, 120, 103, and 106 pounds. Assume the distribution of weights is normally distributed. Find a 95% confidence interval for the
Mean weight of all baby giraffes. Use technology for your calculations. Give the confidence interval In the form "estimate ± margin of error." Round to the nearest tenth of a pound.

• A) \(110.0 \pm 8.5\) pounds
• B) \(111.0 \pm 8.5\) pounds
• C) \(111.5 \pm 9.0\) pounds
• D) There is not enough information given to calculate the confidence interval.

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Definitions:

Marginal Costs

The boost in total charges incurred by producing one more unit of a product or service.

Rational Self-interest

Acting in a way that is most beneficial to oneself, based on logical and reasoned decision-making.

Utility

In economics, the satisfaction or benefit derived from consuming a product or service.

Opportunities

Circumstances that make it possible to do something, often leading to new ventures or investments in economics.