A researcher testing the effects of two treatments for anxiety computed a 95% confidence interval for the difference between the
mean of treatment 1 and the mean of treatment 2. If this confidence interval includes the value of zero, then she should reject the null hypothesis that the two population means are equal: true or false?
Given that a researcher testing the effects of two treatments for anxiety computed a 95% confidence interval for the difference between the mean of treatment 1 and the mean of treatment 2
Also that confidence interval includes zero.
When confidence interval includes zero, we need not reject the null hypothesis since null hypothesis claims that difference =0
When confidence interval includes 0 it confirms that there is no difference and hence null hypothesis should be accepted.
