Question

7
multiple choice 4 points
determine the confidence level.
determine the confidence level for confidence interval shown in the figure below.

98%
95%
90%
80%
99%

Explanation:

Step1: Recall the formula for confidence level

The confidence level is calculated as \(1-\alpha\).

Step2: Find the value of \(\alpha\)

Given \(\frac{\alpha}{2}=0.10\), then \(\alpha = 2\times0.10=0.20\).

Step3: Calculate the confidence level

Substitute \(\alpha = 0.20\) into \(1 - \alpha\), we get \(1-0.20 = 0.80\).

Answer:

\(80\%\)