Answer:
9,4,-1,-6
Step-by-step explanation:
You just need to plug in the x values into the equation and solve.
Answer:rational
Step-by-step explanation:
Answer:
a) P(X≥143)=0
b) This contradicts the study as getting a sample with this proportion is almost impossible (if the proportion of 68% is true).
Step-by-step explanation:
If we use the normal approximation to the binomial distribution we have the following parameters (mean and standard deviation):

Then, we can calculate the probability of X being equal or more than 143 using the z-score:

This contradicts the study as getting a sample with this proportion is almost impossible (if the proportion of 68% is true).
Answer:
The total cost was 81 dollars.
Step-by-step explanation:
If each person had to pay 27 dollars and there was only 3 people, then multiply those 2 numbers together. Then you will get your answer.
I would say 8.0 Because if you do 12.6-4.9 you get 7.7 ...hope that helped