An experiment is designed to determine how speaker size affects loudness. The researcher measures loudness of 18 speakers randomly: 6 speakers have small diameters, 6 have medium diameters, and 6 have larger diameters. The researcher records the loudness (in decibels) of the speakers playing the same sound in the table below, and compared the three types of speakers. f) Enter the data in R as a data frame with one dependent and one independent variable (submit your R Markdown file to d2 l drop box) g) Use pipeline to calculate the mean and standard deviation of loudness for each type of speaker. Listed the mean and standard deviation for each speaker here