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Hypothesis testing of mean-one tail test

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College work study students earned a mean of $1252. Assume that a sample consisiting of 45 of the work study students at a large university was found to have earned a mean of $1277 during that year, with a standard deviation of $210. Would a one-tail test at the 0.05 level suggest the average earnings of this university's work study students were significantly higher than the national mean?

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Solution Summary

Solution describes the steps for conducting one tail test to check whether mean income of sample university is significantly higher than national mean income.

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Please refer attached file for complete description as work done with the help of equation is not printed here.

Solution:

Here sample size n is greater than 30, we use z ...

Solution provided by:
Lokesh Jain, MSc
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  • BEng (Hons) , Birla Institute of Technology and Science, India
  • MSc (Hons) , Birla Institute of Technology and Science, India
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