Question

Technology firm wants to build an app for reading and math skills in children. The development department is researching daily amounts in minutes per day children between the ages of 4 and 7 spend on a smartphone or tablet.

a. Suppose we know that a confidence interval is (32.56.4). Find the error bound (EBM). Do not include EBM = in answer. For example, if EBM = 7.just put 7

Answer 1

EBM, or error bound of the mean, is half the width of the confidence interval. For the given interval of (32, 56.4), EBM is 12.2.

Step-by-step explanation:

The question asks us to calculate the error bound (EBM) given a confidence interval. The error bound (EBM) is found by taking half of the width of the confidence interval.

The confidence interval is presented as (32, 56.4). The error bound can be found by taking the difference between the upper limit of the confidence interval and the point estimate (the sample mean), or equivalently, the difference between the point estimate and the lower limit.

To calculate EBM, use the formula: EBM = (upper limit - lower limit) / 2. So, for the given confidence interval (32, 56.4), EBM = (56.4 - 32) / 2 = 24.4 / 2 = 12.2.