Question 372 pointsSaveWhich of the following is not an element of descriptive statistical problems? a. An inference made about the population based on the sample. b. The population or sample of interest. c. Tables, graphs, or numerical summary tools. d. Identification of patterns in the data.

Question 382 pointsSaveThe head librarian at the Library of Congress has asked her assistant for an interval estimate of the mean number of books checked out each day. The assistant provides the following

interval estimate: from 740 to 920 books per day. If the head librarian knows that the population standard deviation is 150 books checked out per day, and she asked her assistant to use 25 days of data to construct the interval estimate, what confidence level can she attach to the interval estimate?

Question 392 pointsSaveMajor league baseball salaries averaged $1.5 million with a standard deviation of $0.8 million in 1994. Suppose a sample of 100 major league

players was taken. Find the approximate probability that the average salary of the 100 players exceeded $1 million.

Question 402 pointsSaveThe probability that house sales will increase in the next 6 months is estimated to be 0.25. The probability that the interest rates on housing loans will go up in the same period is estimated to be 0.74. The probability that house sales or interest rates will go up during the next 6 months is estimated to be 0.89. The probability that house sales will increase

but interest rates will not during the next 6 months is:

Question 412 pointsSaveA population frame for a survey contains a listing of 6,179 names. Using a table of random numbers, which of the following code numbers will appear on your list? a. 06 b. 0694 c. 6946 d. 61790

Question 422 pointsSave

A study is under way in Yosemite National Forest to determine the adult height of American pine trees. Specifically, the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall. It is estimated that the forest contains 25,000 adult American pines. The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results. Identify the population from which the study was sampled. a. The 250 randomly selected adult American pine trees. b. The 25,000 adult American pine trees in the forest. c. All the adult American pine trees taller than 60 feet. d. All American pine trees, of any age, in the forest.