T tests

If we wanted to compare the mean heights of two different groups of children, which test should we use?

• ANOVA

• Independent samples T test

• Paired samples T test

What is is this an example of: The children in group A are not taller or shorter than the children in group B

• An alternative hypothesis

• A null hypothesis

• A type II error

Which is the correct way to report the findings of a T test?

• t(34)=1.984, p=.895

• t34=(1.984), p=.895

• t34=1.984, p>.895

If a statistical test gives a p value of 0.004, which of the following is true?

• The result is non-significant and the null hypothesis should be accepted

• The result is non-significant and the null hypothesis should be rejected

• The result is significant and the null hypothesis should be accepted

• The result is significant and the null hypothesis should be rejected

What can we tell from this error bar graph?

• The bars are overlapping so the result is likely to be non-significant

• The bars are overlapping so the result is likely to be significant

• The bars are overlapping so the result may or may not be significant