Q1) At certain college, there were 600 science majors, 200 engineering majors, and 500 business majors. If student is chosen at random, determine the probability that student is engineering major?
Q2) According to Internet posting, 80% of adults enjoy drinking beer. If group of 3 adults is chosen at random, determine probability that none of them enjoy drinking beer.
Q3) Mean return for a random sample of 33 mutual funds is= 14.93 percent with standard deviation of 9.57. Create a 95% confidence interval for mu, population mean.
|
a) 11.54 to 18.32
|
|
b) 11.01 to 18.85
|
|
c) 14.82 to 15.04
|
|
d) 0.95 to 18.91
|
Q4) Sample mean is 50, t-statistic is 1.96, and standard error of sample mean is 2. Determine the 95 percent confidence interval?
|
a) 46 to 50
|
|
b) 46.08 to 53.92
|
|
c) 46.80 to 53.29
|
|
d) 48 to 52
|