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FOR A GIVEN N, THE INTERVAL THAT BOUNDS THE POPULATION MEAN

FOR A GIVEN N, THE INTERVAL THAT BOUNDS THE POPULATION MEAN

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Author: Christine Farr
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1. For a given N, the interval that bounds the population mean at the 99% confidence level is ____ that which bounds the population mean at the 95% confidence level
A. equal to
B. greater than
C. less than
D. can't be determined 
 
2. When using the t test, we reject H0 ____.A. if tobt£ tcrit   
B. if | tobt | ³ | tcrit |   
C. if | tobt | £ | tcrit |   
D. if tobt³ tcrit
3. Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. The obtained value of the appropriate statistic for testing H0 is ____.A. tobt = -2.07   
B. tobt = +3.07   
C. tobt = -1.32   
D. tobt = +0.32
4. Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. The df for determining tcrit = ____.


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