1. You use your calculator to perform a test of significance (z test). The calcu
ID: 3370175 • Letter: 1
Question
1.
You use your calculator to perform a test of significance (z test). The calculator reports a P-value = 0.021.
This result is
not significant at the 2.5% level.
significant at the 5% and 1% level.
significant at the 5% level but not the 1% level.
not significant at the 5% level.
2.
Tarantulas are large, long-lived arachnids (spiders). They can be found in the southwest U.S. and in South and Central America. Adults average ? = 5 inches long (body length) . Biologists in Guatemala catch and measure a sample of 49 tarantulas.
The mean and standard deviation of the sampling distribution of x? for the sample of body lengths for 49 tarantulas
5, 1/49 the population standard deviation.
5/7, 1/7 the population standard deviation.
5/49, 1/49 the population standard deviation.
5, 1/7 the population standard deviation.
A.not significant at the 2.5% level.
B.significant at the 5% and 1% level.
C.significant at the 5% level but not the 1% level.
D.not significant at the 5% level.
2.
Tarantulas are large, long-lived arachnids (spiders). They can be found in the southwest U.S. and in South and Central America. Adults average ? = 5 inches long (body length) . Biologists in Guatemala catch and measure a sample of 49 tarantulas.
The mean and standard deviation of the sampling distribution of x? for the sample of body lengths for 49 tarantulas
A.5, 1/49 the population standard deviation.
B.5/7, 1/7 the population standard deviation.
C.5/49, 1/49 the population standard deviation.
D.5, 1/7 the population standard deviation.
Explanation / Answer
Solution :
1 .
C . significant at the 5% level but not the 1% level.
2.
Here infiltration is incomplete because no standard deviation value for population is given
n = 49 and mu=5 hence possible answers would be A or D
Please check if any information is missing for 2.
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