Problem

Find the margin of error for the given values of $c, s$, and $n$. \[ c=0.95, s=5, n=14 \] Click the icon to view the $\mathrm{t}$-distribution table. The margin of error is (Round to three decimal places as needed.)

Solution

Step 1 :We are given that the confidence level $c=0.95$, the standard deviation $s=5$, and the sample size $n=14$.

Step 2 :We first need to find the t-score for a 95% confidence level and 13 degrees of freedom. Using a t-distribution table, we find that the t-score is approximately 2.160.

Step 3 :We can now calculate the margin of error $E$ using the formula $E = t \cdot \frac{s}{\sqrt{n}}$.

Step 4 :Substituting the given values into the formula, we get $E = 2.160 \cdot \frac{5}{\sqrt{14}}$.

Step 5 :Solving this expression, we find that the margin of error $E$ is approximately 2.887.

Step 6 :Final Answer: The margin of error for the given values of $c, s$, and $n$ is \(\boxed{2.887}\).

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Source: https://solvelyapp.com/problems/7559/

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