44In a ttest to determine whether analgesia or a placebo pro

44.In a t-test to determine whether analgesia or a placebo provide pain relief, the t-value obtained for the two-tailed probability p is found to be a low number at p = .042. What can be deduced about this re-sult?

a.There is a 4.2% chance that the null hypothesis will be true.

b.There is a 2.1% chance that the null hypothesis will be true.

c. There is a 4.2% chance that the null hypothesis will be false

. d.There is a 2.1% chance that the null hypothesis will be false.

44a.The value of r (the effect size) is calculated as r = .75. What does this tell you about the data?

a.A large effect and not significant

b.A very large effect and highly significant

c.A small effect and not significant d.A very small effect and not significant

44b.When might the independent t-test be used?

a.One experimental condition and all participants used in that condition

b.Two experimental conditions and all participants used in both conditions

c.Two experimental conditions and different participants used in each condition

d.None of the above

Solution

a.There is a 4.2% chance that the null hypothesis will be true.

is the right option. That is why whenever p <alpha we reject null hypothesis.

--------------------

b.A very large effect and highly significant

When effect size is large, sign is higher.

44B)

c.Two experimental conditions and different participants used in each condition

Because for independent t test two unrelated groups are used