Homework Help: statistics

Posted by nana on Tuesday, October 2, 2012 at 7:31pm.

Suppose it is known that the average score of all high school seniors taking a national test of basic skills is 420. These scores are normally distributed with a standard deviation of 80. A school gives the test to a sample of 144 seniors.
Identify the following characteristics of the sampling distribution for the sample mean (x-bar).
i. the mean
ii. the standard deviation
iii. the shape

No one has answered this question yet.

Answer this Question

Related Questions

statistics - minnie went to union high school while mickey went to southern high...
Statistics - A researcher is interested in whether students who attend private ...
statistics - 1. A researcher is interested in whether students who attend ...
MATH - a total of 50 juniors and seniors were given a mathematics test.the 35 ...
statistics - 5. Each year, a national achievement test is administered to 3rd ...
statistics - The average math SAT score is 500 with a standard deviation of 100...
statistics - Ram earned a score of 940 on a national achievement test. The mean ...
Psych - If an iq test has high predictive validity, then a. a psychologist can ...
math - In his NPR radio program "A Prairie Home Companion," Garrison ...
statistics - At a local high school students were randomly assigned to one of ...

For Further Reading

First Name:
School Subject:
Answer: