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A cable company want you to conduct a test to see if the proportion of its cable subsribers that
have complaints against the company is less than .13.
What is the alternative hypothesis?
XNone of the above.
When computing a test for the variance, what parameter is used in the null and alternative
hypotheses?
sigma^2
Set up the alternative hypothesis to test if the population mean of the PostTramatic Stress
Disorder Test for WWII POW survivors is less than 16.
H1: mu< 16
Science Magazine reported that the mean listening time of 7monthold infants exposed to a
threesyllable sentence (e.g., "I love you") is 9 seconds.
A sample of 50 infants of the same age
was tested at a hospital in Houston and found the average time to be 8 seconds.
We want to test
to see if the population mean is different from 9 seconds.
What is the null hypothesis?
Ho: mu=9
You are instructed to conduct a test to see whether the mean pouring temperature differs from the
target setting of 20 degrees by taking a sample of 50 parts.
What is the alternative hypothesis?
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This note was uploaded on 10/02/2008 for the course STAT 2004 taught by Professor Melutz during the Fall '07 term at Virginia Tech.
 Fall '07
 MELutz
 Statistics, Variance

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