Answer:
0.00003
Step-by-step explanation:
Using the z-distribution, the estimate for how much the drug will lower a typical patient's systolic blood pressure is:
<h3>What is a z-distribution confidence interval?</h3>
The confidence interval is:
In which:
- is the sample mean.
- is the standard deviation for the population.
In this problem, we have a 80% confidence level, hence, z is the value of Z that has a p-value of , so the critical value is z = 1.28.
The other parameters are given by:
Then the bounds of the interval are:
Hence the interval is:
More can be learned about the z-distribution at brainly.com/question/25890103
#SPJ1
Answer:
Mean
Step-by-step explanation:
To calculate the mean you have to sum the values and then divide them by the number of values; for example, if you have 1 and 10, the mean will be 1+10 = 11, then 11/2 = 5.5, the mean is 5.5. The mean is affected by the highest value. If we continue summing high values, the mean will go grow, for example, if you have 1, 10, 10, the mean will be, 1+10+10 = 21 then 21/3 = 7. The mean is 7, and it is closer to 10 than 1.
As the reporter wants to show they are overpaid, the mean will give a number that its affected by the highest value, in this case, the player with a higher salary.