The tar content in 30 samples of cigar tobacco follows:

(a) Is there evidence to support the assumption that the tar content is normally distributed?
(b) Find a 99% CI on the mean tar content.
(c) Find a 99% prediction interval on the tar content for the next observation that will be taken on this particular type of tobacco.
(d) Find an interval that will contain 99% of the values of the tar content with 95% confidence.
(e) Explain the difference in the three intervals computed in parts (b), (c), and (d).

Transcribed Image Text:

1.532 1.499 1.542 1.622 1.585 1.466 1.466 1.494 1.478 1.523 1.611 1.626 1.548 1.542 1.397 1.546 1.440 1.520 1.532 1.511 1.487 1.608 1.533 1.498 1.459 1.598 1.558 1.545 1.600 1.504