The number of hospital beds in a sample of 20 hospitals is shown below. Construct a frequency distribution and a frequency histogram for the data set using 5 classes. Describe the shape of the histogram as symmetric, uniform, negatively skewed, positively skewed, or none of these. 172 163 128 132 176 161 165 224 146 133 0 198 211 151 259 266 242 298 142 208 184 . . . Construct a frequency distribution for the data set using 5 classes. (Type whole numbers.) Class Frequency 128-162 163-197 198-232 233-267 268-302