SAA, SAS, SSS, and ASA should be the correct answers-
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
First off, we'll convert the mixed fractions to "improper", and proceed,
We learned this in the sixth grade, give me a sec till I get my text book