Which function is used to calculate the margin of error if summary statistics are available in Excel?

The function used to calculate the margin of error in Excel when summary statistics are available is indeed correct. The function =CONFIDENCE.NORM(alpha, s, n) is specifically designed for this purpose.

This function computes the margin of error for a population mean, which is crucial in constructing confidence intervals. The parameters that it requires include the significance level (alpha), the standard deviation of the sample (s), and the sample size (n). By utilizing these inputs, the function determines how much the sample mean could deviate from the actual population mean with a specified degree of confidence.

In contrast, the other options are not suitable for calculating the margin of error directly. For example, using =STDDEV(range) and =STDEV.P(range) provides standard deviation values, but these do not yield margin of error calculations on their own. The =AVERAGE(range) function simply calculates the mean of the specified data points and does not address margin of error at all. Therefore, the appropriate function for determining the margin of error in the context of confidence intervals and summary statistics is =CONFIDENCE.NORM.