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Normal population with a mean

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A random sample is selected from a normal population with a mean of u=30 and a standard deviation of o=8. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=33.

a. If the sample consists of n=16 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with ox=.05.

b. If the sample consists of n=64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Us a two tailed text with ox= .05.

c. Comparing your answers for parts a and b. explain how the size of the sample influences the outcome of a hypothesis test.

Reference no: EM131402669

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