According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg (Kuulasmaa, Hense & Tolonen, 1998). Blood pressure is normally distributed.
· Suppose a sample of size 15 is taken. State the shape of the distribution of the sample mean.
· Suppose a sample of size 15 is taken. State the mean of the sample mean.
· Suppose a sample of size 15 is taken. State the standard deviation of the sample mean.