I the Student T Distribution Has a Greater Spread Than

question 78

Multiple Choice

i. The Student t distribution has a greater spread than does the z distribution. As a result, the critical values of t for a given level of significance are larger in magnitude than the corresponding z critical values.
Ii) The test statistic t has n-1 degrees of freedom.
Iii) William S. Gosset, a brewmaster, developed the t test for the Guinness Brewery in Ireland, who published it in 1908 using the pen name "Student."

• A) (i), (ii) and (iii) are all correct statements
• B) (iii) is a correct statement but not (i) or (ii).
• C) (i) and, (iii) are correct statements but not (ii).
• D) (ii) and, (iii) are correct statements but not (i).
• E) All statements are false

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