A businessman is considering investing in the small business. A random sample of 45 companies revealed that the mean was 6.4% of return and the standard deviation was 1.3%. Do the data support that the return differs from 6% with significance level α=0.01;0.02;0.03; 0.04;0.05? Use P-value.

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A businessman is considering investing in the small business. A random sample of 45
companies revealed that the mean was 6.4% of return and the standard deviation was
1.3%. Do the data support that the return differs from 6% with significance level
α=0.01;0.02;0.03; 0.04;0.05? Use P-value. 

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