Statistic and Probability SHS

1. The following are the Math final grade of the previous Grade 11 at Kings College of the Philippines in Statistics and Probability. Compute the mean, variance and standard deviation. 2. Assuming that the grades are normally distributed, what is the probability that the grades is between 85 and 90? Less than 80? Greater than 90? Sketch the normal curve. 3. Who performs better (based from the mean)? (Write your complete solutions and final answers In short bond papers) Class 1 90 97 81 94 95 90 91 95 93 95 98 94 94 90 90- 92 54 92 92 193 92 88 95 90 92 92 91 92 95 96 93 96 96 92 92 95 96 92 96 89 91 92 90 91 90 90 89 95 Class 2 90 91 89 94 88 94 90 92 92 94 89 90 97 91 90 91 92 89 93 91 90 88 94 86 93 90 94 92 94 83 91 98 92 92 95 96 93 93 90 92 97 93 92 94 94 95 92 93