1. A sample of 75 was taken from a population with a standard deviation of 13.5 and a mean of 25. The probability that the sample mean will be greater than 27 is

a.0.0963

b.0.0983

c.0.1003

d.0.1023

2. A population consists of 500 elements. We want to draw a simple random sample of 50 elements from this population. On the first selection, the probability of an element being selected is

a.0.002.

b.0.001.

c.0.100.

d.0.010.

3. A random sample of 80 was taken from a finite population of size 896. The standard deviation is 288.7. Calculate the standard error to two decimals. Do not enter with commas.

Answer: