By the empirical rule, 95% of the distribution is within 2 standard deviations. Since the other 5% is split equally between the two tails of the distribution, the empirical rule says 2.5% will be below -2 standard deviations from the mean.
... 266 days - 2×(16 days) = 234 days
The shortest 2.5% of pregnancies last less than 234 days.
Answer:
1
Step-by-step explanation:
1^2=1
The expanded form is 500,000+4,000+40+7