Section 4-9 Notes
Download 196.45 Kb.
|
- Navigate this page:
- Problem4.29
- Solution
Section 4-9 Notes
  Problem4.29: Suppose we have selected a random sample of n = 36 observation from a population with mean equal to 80 and standard deviation equal to 6. It is known that the population is not extremely skewed. Sketch the relative frequency distributions for the population and for the sampling distribution of the sample mean 
Find the probability that will be later than 82.
Solution:
Problem 4.30: A manufacturer of automobile batteries claims that the distribution of the lengths of life and its best battery has a mean of 54 months and a standard deviation of 6 months. Suppose a consumer group decides to check the claim by purchasing a sample of 50 of the batteries and subjecting them to tests that estimate the battery’s life. Assuming that the manufacturer’s claim is true, describe the sampling distribution of the mean lifetime of a sample of 50 batteries. Assuming that the manufacturer’s claim is true, what is the probability that the consumer group’s sample has a mean life of fewer months? Solution: Directory: userfiles -> 140 -> Classes userfiles -> Recovery: What's a Coach Got To Do With It? By Bill Ryan userfiles -> Title: Associate Professor userfiles -> Chief Patron Shri Avinash Dikshit Commissioner Patron userfiles -> Iccf congress, seixal, portugal 5th to 12th October 2002 userfiles -> Unit 1: Exploration and Colonization userfiles -> Ap united States History Course Description userfiles -> Note: Please look through resources very carefully. This is a controversial issue so some sources may have bias. Check carefully for the expertise or background of the writer or contributor userfiles -> Ap united states history mr. Storrs – Room 306 2009-2010 text Classes -> Extra credit Download 196.45 Kb. Share with your friends:
|