The Weights at Birth of Five Randomly Chosen Baby Giraffes

question 48

Multiple Choice

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 ± 8.5 pounds
• B)111.0 ± 8.5 pounds
• C)111.5 ± 9.0 pounds
• D)There is not enough information given to calculate the confidence interval.

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