A random sample of 35 scores from the Gen Math examination of ABM learners is taken and gives a sample mean of 63. At a 90% level of confidence, the interval estimate of the population mean is between...

A random sample of 35 scores from the Gen Math examination of ABM learners is taken and gives a sample mean of 63. At a 90% level of confidence, the interval estimate of the population mean is between 62.18 and 66.82. What is the length of the confidence interval in the given problem?