A researcher wants to look at how exercise affects mood. sheanticipates that exercising more will improve mood. she has a groupof participants run for 30 minutes and then has them rate how happythey feel on a scale from 0-10 and obtains the following scores:9,7,8,5,7,6,4. The population mean on this Likert scale is 5. Use at-test to determine if the treatment is statisticallysignificant/you should reject the null hypothesis at the .05, .01,and .001 p-values.
