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
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Answer:
7.92 cm²
Step-by-step explanation:
Area of Trapezium :
- 1/2 x (a + b) x h
- 1/2 x (4.8 + 8.4) x 1.2
- 0.6 x 13.2
- 7.92 cm²
26/7
4/7=8/14
5/2=35/14
8/14+9/14+35/14=52/14=26/7
mark brainliest please??
Answer:
sin A = 40/41
tan A = 40/9
cos A = 9/41
Step-by-step explanation:
sin theta = opp/ hyp
tan theta = opp/ adj
cos theta = adj/ hyp
We want to find the measures for angle A
sin A = 40/41
tan A = 40/9
cos A = 9/41