Q1) In most recent election, 20% of all eligible college students voted. If the random sample of 20 students were surveyed:

Determine the probability that at least five students voted in election. 

a) 0.1746

b) 0.2182

c) 0.3704

d) 0.6296

Q2) Fair die is rolled 10 times. Determine the probability that the odd number (1, 3 or 5) will occur less than 4 times? 

a) 0.1719

b) 0.1172

c) 0.2051

d) 0.3770

e) 0.0439

Q3) A fair die is rolled 36 times. Find out standard deviation of even number (2, 4 or 6) outcomes? 

a)18

b) 6

c) 4

d) 3

Q4) Of all individual tax returns, 37% comprise errors made by taxpayer. If IRS examiners are allotted randomly selected returns in batches of 12, determine mean and standard deviation for number of erroneous returns per batch. 

a) µ=2.80, σ=1.67

b) µ =4.44, σ =1.67

c) µ =4.44, σ =2.80

d) µ =2.80, σ =2.10