Bella has sampled the heights of 30 students at Ridgemont High and obtained a mean of 64.2 inches. He constructs a 90% confidence interval, which turns out to be (61.0, 67.4). What is the ma

A) 2.1 inches

B) 3.2 inches

C) 4.2 inches

D) 6.4 inches rgin of error?

The correct answer for the question that is being presented above is this one: " C) 4.2 inches." Bella has sampled the heights of 30 students at Ridgemont High and obtained a mean of 64.2 inches. He constructs a 90% confidence interval, which turns out to be (61.0, 67.4). The margin of error is C) 4.2 inches