can you please help me.

Planned comparisons: Select one: a. Use the Welsh test to control for Type 1 error b. Use the Bonferroni or Holm's methods to distribute the .05 alpha level between contrasts O c. Use the Scheffe test to control for Type 1 error O d. Are used after you have a significant ANOVA findingInternal validity can be defined as: Select one: O a. Controlling for individual differences O b. The effect of X and Y on Y c. The reliability of our findings O d. The confidence we have in the causal connection between variablesThe Tukey test is used as a post-hoc procedure in preference to Student Neuman- Keuls test when: Select one: O a. we have 3 group means b. we have 4 or more group means c. we have small effect sizes O d. we have large effect sizesThe obtained Fvalue of a study that uses a one-way ANOVA to test for differences between 4 means is 5.270, this means that: Select one: a. the between group variance was greater than the within group variance O b. the groups differ O c. as it is over 1, you would need to conduct post-hoc testing O d. the result is significant