Answer:
36
Step-by-step explanation:
The variance of one human is σ² = 36 days. Each gestation time for each human of the sample is independant of the other.
Both variance and mean of the sum of identically distributed indipendant random variables is equivalent to the product of the variance/mean of one element of the sample by the sample length.
Therefore, if we take the sum n of random variables with variance 36, then the variance of the sum will be 36*n. The sampling distribution is obtained from the sum by dividing by n. If we divide by a number, then the variance will be divided by its square. So the variance of the sampling distribution is 36*n/n² = 36/n, and the standard deviation is 6/√n days.
If we want the sampling distribution to have standard deviation equal to 1 day, then we need n such that
This shows that the sample length should be 36.
Answer: C. 16.9
Step-by-step explanation: To find the perimeter you have to add all the sides of the figure.
Answer:
2
Step-by-step explanation:
12/7
=12 ÷ 7
=1.71428571429
nearest tenth?
= 2 because after 1. is 7 and when you round it to the nearest ten it will be 10, so it's a whole. so then that means that it would be 2.