A Researcher Computes a

Multiple Choice

A researcher computes a .95 confidence interval for an experimental group to be 2.0 - 8.0,and computes a .95 confidence interval for a control group to be 0.0 - 4.0.Based on these confidence intervals,the researcher can state that

A) the results for the effect of the independent variable on the dependent variable are inconclusive.
B) the independent variable definitely influenced participants' scores on the dependent variable because the upper limit of the confidence interval is twice that of the control group.
C) the independent variable definitely did not affect participants' scores because the lower limit of the confidence interval for the control group is zero.
D) the population value for the experimental group is .95.