A new reading program was being evaluated in the fourth grade at an elementary school. A r...

A new reading program was being evaluated in the fourth grade at an elementary school. A random sample of 20 students was thoroughly tested to determine reading speed and reading comprehension. Based on a fixed-length standardized test reading passage, the following speeds (in minutes) and comprehension scores (based on a 100-point scale) were obtained.

a. Use the reading-speed data to place a 95% confidence interval on