# Random Sample

A. n=17. Find P(t<-1.746) aa) .05 bb).95 cc).45 dd) 1.0 B. A random sample of 64 observations is observed from a population of SAT scores in 2001. Which of the following is a correct statement? aa) It is the distribution of the observed 64 SAT scores. bb) X-bar is approximately normal. cc) The mean of all possible x-bars is average of a set of 64 scores. dd) The variance of x-bars is the same as the population variance. Please explain how you derived at your solution and add any comments that you feel might be helpful.

Â© BrainMass Inc. brainmass.com December 24, 2021, 4:59 pm ad1c9bdddfhttps://brainmass.com/statistics/normal-distribution/random-sample-population-variance-20760

#### Solution Summary

A. n=17. Find P(t<-1.746) aa) .05 bb).95 cc).45 dd) 1.0 B. A random sample of 64 observations is observed from a population of SAT scores in 2001. Which of the following is a correct statement? aa) It is the distribution of the observed 64 SAT scores. bb) X-bar is approximately normal. cc) The mean of all possible x-bars is average of a set of 64 scores. dd) The variance of x-bars is the same as the population variance.

Please explain how you derived at your solution and add any comments that you feel might be helpful.