Distribution Free Hypothesis Testing: One Sample Sign Test Example (A)

The lifetimes (hours) of a random sample of ten light bulbs is taken from a large batch produced by the Xtralong factory after an expensive machine overhaul. The lifetimes were measured to be 523 556 678 429 558 498 399 515 555 699 Before the overhaul the median lifetime was 500 hours Use a sign test, at the 5% significance level to test the hypothesis that the median length of life of a bulb is greater than 500 hours after the overhaul Recorded with https://screencast-o-matic.com