Express the confidence interval $28.2 % \pm 5.7 %$ in interval form.

Express the answer in decimal format (do not enter as percents).
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Final Answer: The confidence interval $28.2 % \pm 5.7 %$ , in interval form, is $[0.225, 0.339]$ .

Steps

Step 1 ：The lower limit of the interval is calculated by subtracting the percentage error from the given percentage: $28.2 % - 5.7 % = 22.5 %$ .

Step 2 ：The upper limit of the interval is calculated by adding the percentage error to the given percentage: $28.2 % + 5.7 % = 33.9 %$ .

Step 3 ：To convert these percentages to decimal format, we divide by 100. So, the lower limit in decimal format is $22.5 % / 100 = 0.225$ .

Step 4 ：Similarly, the upper limit in decimal format is $33.9 % / 100 = 0.339$ .

Step 5 ：Final Answer: The confidence interval $28.2 % \pm 5.7 %$ , in interval form, is $[0.225, 0.339]$ .