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 1. What gathering technique was used? 2. Construct a histogram for the data. 3. Check the skewness using Pearson's Index.

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CASE 02
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
1. What gathering technique was used?
2. Construct a histogram for the data.
3. Check the skewness using Pearson's Index.
4. Based on your computation, is the distribution approximately normal?
5. Find the mean and standard deviation for the data.
6. What is P(X > 400)?
Transcribed Image Text:CASE 02 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 1. What gathering technique was used? 2. Construct a histogram for the data. 3. Check the skewness using Pearson's Index. 4. Based on your computation, is the distribution approximately normal? 5. Find the mean and standard deviation for the data. 6. What is P(X > 400)?
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