Using the z-distribution, it is found that the 90% confidence interval is given by: (0.6350, 0.6984).
<h3>What is a confidence interval of proportions?</h3>
A confidence interval of proportions is given by:
In which:
- is the sample proportion.
In this problem, we have a 90% confidence level, hence, z is the value of Z that has a p-value of , so the critical value is z = 1.645.
The sample size and the estimate are given by:
Hence, the bounds of the interval are given by:
The 90% confidence interval is given by: (0.6350, 0.6984).
More can be learned about the z-distribution at brainly.com/question/25890103
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A, B, C, D, E, F for letters
0,1,2,3,4,5,6,7,8,9 for numbers
Answer: 75
Step-by-step explanation:
The area formula for a trapzoid is area= 1/2 (a+b) h
In this equasion, the substitution would be area=1/2 (10+15) 6
Following PEMDAS, enter the numbers within the parenthases (10+15)
Divide the 25 in half, then multiply by 6. This comes out to 75.