Practice steps of test for mean For a quantitative variable, you want to test Ho: = 0 against Ha: 0. The 10 observations are
3, 7, 3, 3, 0, 8, 1, 12, 5, 8.
a. Show that (i) = 5.0, (ii) = 3.71, (iii) standard error = 1.17, (iv) test statistic = 4.26, and (v) df = 9.
b. The P-value is 0.002. Make a decision using a significance level of 0.05. Interpret.
c. If you had instead used Ha: 0, what would the P-value be? Interpret it.
d. If you had instead used Ha: 0, what would the P-value be? Interpret it.
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