4.051 rounded to the nearest hundredth is 4.05 because you rounded down from 1.
Answer:yo momma
Step-by-step explanation:
Answer:
a)Both X and Y can be well approximated by normal random variables.
Step-by-step explanation:
For each individual, there are only two possible outcomes. Either they are right-handed, or they are left-handed. This means that we can solve this problem using concepts of the binomial probability distribution.
Binomial probability:
Probability of exactly x sucesses on n repeated trials, with probability p.
The binomial probability can be well approximated by normal random variables, using the expected value and the standard deviation
Let X be the number of males (out of the 100) who are left-handed.
and . Can be well approximated.
Let Y be the number of females (out of the 80) who are left-handed.
and . Can be well approximated.
The correct answer is
a)Both X and Y can be well approximated by normal random variables.
All you do is solve for z. So 8z-13=7. To solve for a variable you have to do the opposite to cancel out the numbers on each side. First you add 13 over to 7 to cancel out 13 on the z side. So 8z=20 is what you have left. Then you divide 8 on both sides to cancel out 8 on the z side. what you are left with is z=2.5. Lastly you plug and check. 8(2.5) - 13 = 7, 20-13=7. And thats correct so z is 2.5.