SOLUTION
1. In the above sample of 14 students, there are 5 males and 9 females. So, probability of selecting atleast one male = 1 - probability of selecting 0 males = 1 - 9C3/14C3 = 0.7692
2. 90% confidence interval for mean age: (population SD is unknown)
Sample mean +- t0.05,n-1* sample sd/√n
= 24.286 +- 1.96*9.895/√14
= (19.102, 29.469)
3. If 4 students are randomly selected, probability of all females = 9C3/14C3= 0.2307
conducted to determine success rates of students enrolled in the Statistics courses offered at South Plains College for the fall semester of 2015. A random sample of 14 students was taken, and...
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