According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg. Blood pressure is normally distributed. Suppose a sample of size 21 is taken. a) Find the standard deviation of the sampling distribution of the sample mean. Put the numeric value rounded to two decimal places in the first box and the correct units in the second box. b) Find the probability that the sample mean blood pressure of the 21 randomly selected people in China is less than 120.6 mmHg. Round final answer to 4 decimal places. Use the EXACT value of the standard deviation with the square root. c) Find the probability that the sample mean blood pressure of the 21 randomly selected people in China is more than 137.7 mmHg. Round final answer to 4 decimal places. Use the EXACT value of the standard deviation with the square root.
According to the WHO MONICA Project the
a) Find the standard deviation of the sampling distribution of the sample mean.
Put the numeric value rounded to two decimal places in the first box and the correct units in the second box.
b) Find the
Round final answer to 4 decimal places.
Use the EXACT value of the standard deviation with the square root.
c) Find the probability that the sample mean blood pressure of the 21 randomly selected people in China is more than 137.7 mmHg.
Round final answer to 4 decimal places.
Use the EXACT value of the standard deviation with the square root.
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