Q1\

Suppose 12 students took an exam. And, their scores were 81, 85, 89, 90, 90,

98, 76, 89, 82, 94, 72, 85. Provide a graph of the empirical distribution function.

Q2\

A random sample of 100 seniors at a high school were given a skills test. The average score of the sampled

students was 80 and the standard deviation was 7.

Find a 95% confidence interval for the mean score of all seniors at that high school.