It should be noted that it isn't possible for the manufacturer to adjust the confidence interval to take this nonresponse into account.
It should be noted that the confidence interval measures the degree of uncertainty or certainty that is found in a sampling method.
In this case, the confidence interval shows the probability which a parameter will fall between a pair of values.
From the complete question, it's not possible to adjust the confidence interval to compensate for the bias that is inherent in the data collection method.
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