Light Bulb Lifetime. Use the following information for Exercises 74 and 75. An electrical company has developed a new form of light bulb that it claims lasts longer than current models. The company has 1 million bulbs in its inventory.

Question 1.83

75. Suppose you take a representative sample of 100 of the new light bulbs and find the average lifetime to be 2000 hours.

  1. Is this a statistic or a parameter?
  2. Write a sentence that estimates the average lifetime of all the new light bulbs.

1.2.75

(a) Statistic (b) An estimate of the average lifetime of all new light bulbs is the average lifetime of the sample of 100 light bulbs, which is 2000 hours.