Which of the Following Statements Are Not True?
A) the Two-Sample

Which of the following statements are not true?

A) The two-sample t test is more flexible than the F test when the number of treatments or populations is 2.
B) The two-sample t test is valid without the assumption that the two population variances are equal.
C) The two-sample t test can be used to test $H _ { \pm } : \mu _ { 1 } > \mu _ { 2 } \text { or } H _ { \pm} : \mu _ { 1 } < \mu _ { 2 }$
As well as $H _ { \pm } : \mu _ { 1 } \neq \mu _ { 2 }$
)
D) The F test can be used to test $H _ { \pm } : \mu _ { 1 } > \mu _ { 2 } \text { or } H _ { \pm } : \mu _ { 1 } < \mu _ { 2 }$
As well as $H _ { \pm} : \mu _ { 1 } \neq \mu _ { 2 }$
)
E) When the number of treatments or populations is at least 3, there is no general test procedure known to have good properties without assuming equal populations variances.