Chapter 24 - gjhvvjhjvh PDF

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MATH 147 Prof. Carlinda Azevedo Chapter 24 Practice Problems

1. Lab workers want to estimate the length of a metal rod. They make 49 measurements. The average of the measurements is 1.01 meters with SD 0.007 meters. Give a 95.5% confidence interval for the length of the rod.

2. To estimate the weight of a shipping container 25 weighings are made. The average of the weightings is 25,225 pounds with a SD of 315 pounds. Find a 86.6% confidence interval for the weight of the container.

3. A titanium bar is weighed 36 times. The average of the weightings is 9.2 pounds and SD 0.018 pounds. Find a 95.5% confidence interval for the weight of the bar.

4. A cargo truck is weighted 25 times. The average of the weightings is 70,056 pounds with SD 225 pounds. Find a 68% confidence interval for the weight of the truck.

5. To estimate the volume that a cylindrical metal container can hold, 25 measurements are made of the volume inside the container. The average of the measurements is 85.5 cubic inches, and SD is 0.5 cubic inches. Find a 86.6% confidence interval for the volume of the container....