A manufacturer of flashlight batteries took a sample of 10 batteries from a day's production and used them continuously until they were drained. The time (in hours) the batteries were used until...

1.Check the skewness using Pearson's Index.

2. Based on your computation, is the distribution approximately normal?

Extracted text: A manufacturer of flashlight batteries took a sample of 10 batteries from a day's production and used them continuously until they were drained. The time (in hours) the batteries were used until failure is given: 397 355 415 395 352 436 327 417 276 461