This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Joe and Bob are playing in the club bowling tournament. Their scores vary as they
play repeatedly. Joe’s score X has the N(201, l 1) distribution, and Bob’s score Y
has the N(197, 8) distribution. Their scores areindependent. Round the standard
deviation of (XY) to four decimal places. Using that rounded number, What is the
probability that Joe wimast two points higher than Bob (rounded to m
decimal places)? (Remember to express your answer as a proportion.) 4. Tom and George are playing in the club golf tournament. Their scores vary as they
play the course repeatedly. Tom’s score X has the N(l 1 1, 9) distribution, and
George’s score Y varies from round to round according to the N(l 01, 7 «
distribution). Their scores are independent. Round the standard deviation of (X
Y) to four decimal places. Using that rounded number, what is the probability that
Tom’s score Will be. at least one point lower than George’s score (rounded to fo_ur decimal places)? (Remember to express your answer as a proportion.) An experiment on the teaching of reading compares two methods, A and B. The
response variable is the Degree of Reading Power (DRP) score. The experimenter
uses Method A in a class of 100 students and Method B in a comparable class of ,
100 students. The classes are assigned to the teaching methods at random.
Suppose that in the population of all children of this age the DRP score has the
N(35, 15) distribution if Method A is used and the N(37, 13) distribution if Method
B is used. Let us call the mean DRP score for 100 students in the A group a? . Let us
call the mean DRP score for 100 students in the B group y. Round the standard deviation of (i  35 ) to four decimal places. Using that rounded number, what is the probability that the mean score for the B group will be at least three points
higher than the mean score for the A group (rounded to four decimal places)?
(Remember to express your answer as a proportion.) ...
View Full
Document
 Spring '08
 ABDUS,S.

Click to edit the document details