Earning and maintaining the ________ of an audience is necessary for ethical public speaking.

Members with low levels of communication apprehension may appear more confident

True False

When is a t-test used?

a. to determine whether differences between two groups, representing the attributes of the nominal level independent variable, differ on a measure of the interval or ratio level dependent variable. b. to determine the degree to which two interval or ratio level variables are associated or related c. to determine the degree to which there are significant differences between the frequencies of attributes of two nominal level variables. d. to determine the degree to which several different groups of nominal level variables significantly differ on the interval or ration level dependent variable.