Suppose systolic blood pressure of 18-year-old females is
approximately normally distributed with a mean of 119 mmHg and a
variance of 619.51 mmHg. If a random sample of 21 girls were
selected from the population, find the following
probabilities:
a) The mean systolic blood pressure will be below
116 mmHg.
probability =
b) The mean systolic blood pressure will be above
120 mmHg.
probability =
c) The mean systolic blood pressure will be
between 107 and 119 mmHg.
probability =
d) The mean systolic blood pressure will be
between 104 and 115 mmHg.
probability =
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