Ledolter and hogg (see references) report that a manufacturer of metal alloys is concerned about cus- tomer complaints regarding the lack of uniformity in the ’s alloyfilaments. fiftyfil- aments are selected and their melting points determined. the following results were obtained: 320 326 325 318 322 320 329 317 316 331 320 320 317 329 316 308 321 319 322 335 318 313 327 314 329 323 327 323 324 314 308 305 328 330 322 310 324 314 312 318 313 320 324 311 317 325 328 319 310 324
(a) construct a frequency distribution and display the histogram of the data.
(b) calculate the sample mean and sample standard deviation.