Haywood

A school psychologist is trying to determine the lower boundary of a confidence interval for a IQ measure that has a mean of 100 and a standard deviation of 30 and a sample size of 100. What is the lower boundary if she was to create a 95% confidence inte...

There are two race cars. the sum of their fastest speed is 50o.3 miles per hour. If the If the speed of one of the cars is 2.8 mph faster then the other car, what are the speeds of each car?