Print a copy of the histogram of the sample mean for the 4000 possible samples. Inspect each of these distributions. Distributions that have a long tail to the right are called right skewed , while those with long tails to the left are called left skewed . Write down your guesses. Compare the population values for the mean, variance, standard deviation, minimum, maximum, and range with the expected values from Table 2.
Computer programs can generate many simple random samples effortlessly.
We can use the programs to study the properties of the sample mean as a function of the number of subjects selected in the sample. You will study how the mean and variance of the sample mean varies with the sample size here. Calculate sample mean using values for subjects selected in the sample. Repeat the sampling for 4800 samples. Creates a Percent Frequency Histogram of the sample means for the 4320 samples.