Mean 266 Days
STD=16 Days
Question 1-
What is the probability that a random sample of 20 pregnancies that has a mean gestation period of 260 days or less?
So let me first solve it.
16/√20=3.578
260-266/3.578=-1.676 and it will become = .0465
Question 2
What is the probability that random sample of 50 pregnancies that a has mean gestation of 260 or less.
Same steps as above and the answer will be .0040.
Okay.... For the first question the answer in the book states... If we take a 100 simple randm sample of size n=20 human pregnancies then about 5 of the sameples result in a mean gestation period of 260 or less.
2nd question.. If we take a 1000(yes, 1,000) random samples of size n=50...... And etc(same type of summary explained)
Okay, my question is where is the 100 simple random sample, and 1,000 Random Samples coming from?
STD=16 Days
Question 1-
What is the probability that a random sample of 20 pregnancies that has a mean gestation period of 260 days or less?
So let me first solve it.
16/√20=3.578
260-266/3.578=-1.676 and it will become = .0465
Question 2
What is the probability that random sample of 50 pregnancies that a has mean gestation of 260 or less.
Same steps as above and the answer will be .0040.
Okay.... For the first question the answer in the book states... If we take a 100 simple randm sample of size n=20 human pregnancies then about 5 of the sameples result in a mean gestation period of 260 or less.
2nd question.. If we take a 1000(yes, 1,000) random samples of size n=50...... And etc(same type of summary explained)
Okay, my question is where is the 100 simple random sample, and 1,000 Random Samples coming from?