Question

A sample of size 8 is drawn from a population with an unknown distribution, and the sample mean is calculated. If the mean of the population is 27 with a standard deviation of 8.5, what is the probability the sample mean will be smaller than 20? 0.0099 0.2051 0.7949 0.9901 The probability cannot be determined using typical methods since the shape of the sampling distribution is unknown. If SAT scores are normally distributed with a mean of 500 and a standard deviation of 100, what minimum score is needed to ensure that you are in the top 7%? 645 500 640 650 648

          A sample of size 8 is drawn from a population with an unknown distribution, and the sample mean is calculated.  If the mean of the population is 27 with a standard deviation of 8.5, what is the probability the sample mean will be smaller than 20?
0.0099
0.2051
0.7949
0.9901
The probability cannot be determined using typical methods since the shape of the sampling distribution is unknown.
If SAT scores are normally distributed with a mean of 500 and a standard deviation of 100, what minimum score is needed to ensure that you are in the top 7%?
645
500
640
650
648

Added by Montserrat B.

Question

Please give Ace some feedback