Crawling data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl: a) explain carefully what the software output means. b) what is the margin of error for this interval? c) if the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller? explain.

 85 pounds

Step-by-step explanation:-

Given : The weight of an object on Venus is about it's weight on Earth and the weight of an object on Mars is about it's weight on Earth.

When somebody weighs 170-pound , then his weight on Venus will be :_

His weight on Mars will be :-

Then , the difference  in the weight of a 170-pound person on Venus and Mars :-

Hence, the difference  in the weight of a 170-pound person on Venus and Mars = 85 pounds