Trading volume on the New York Stock Exchange is heaviest during the first half hour of the trading day. The early morning trading volumes (millions of shares) for some of days in some months are shown here:

214, 163, 265, 194, 180, 202, 198, 212, 201, 174, 171, 211, 211, 183, 231, 321, 120, 119, 178, 145, 156, 125

a) Write the name of the target population. What about the target population size?

b) Draw a random sample of size 10 from the target population. Explain the way you used the given random number table.

c) Write the formula of sample mean and sample variance and calculate these two measures based on your selected 10 simple random samples.

d) Write a summary based on your calculated sample mean and sample SD.