Question

Unnithan, Houser, and Fernhall (2006) were interested in whether playing the game Dance Dance Revolution (DDR) affected the heart rate of overweight and non-overweight adolescents differently. A group of 22 adolescents, 10 classified as overweight and 12 as not overweight played DDR for 12 minutes, during which time the researchers measured each participant's heart rate. Which statistical test should the researchers use to analyze their data?A) independent-samples t testB) dependent-samples t testC) z testD) single-sample t test

Answer 1

dependent-samples t test

Explanation:

Here we want to test the effect of game Dance Dance Revolution (DDR) on heart rate.

The hypothesis is

`H_0:\mu_d=0 vs H_a:\mu_d\\eq 0`

where,

`\mu_d=(\sum di)/(n) di = Xi-Yi`

Where Xi = heart rate before playing the game Dance Dance Revolution (DDR)

Yi = heart rate after playing the game Dance Dance Revolution (DDR)

This test is paired t-test( dependent sample t test).

To measure the effect of experiment. (before - after condition)