A random sample of 20 students yielded a mean of x = 72 and a variance of s2 = 16 for scores on a college placement test in mathematics. Assuming the scores to be normally distributed, construct a 98% condence interval for 2.

Sergio Gonzalez Week 4 STATS 241 Chapter 4 Pt 2 Probability 19 20 21 22 Parents 17 20 16 16 69 Own 6 14 19 24 63 Other 4 6 4 3 17 Total 27 40 39 43 149 1. What is the Probability of picking a 19 year old 27/149= 18.12% 2. What is the probability of picking someone who is not 19 years old 10018.12= 81.88% 3. What is the probability that we pick someone who i