13. Look at the following output from a paired t-test analysis:

Which is the most sensible answer?

Paired Samples Statistics neutral-errors .7111 congruent-errors .2651 2.963E-02 Std. Error Mean .2250 7.500E-02 Mean Std. Deviation Pair 1 Paired Samples Correlations congruent-errors & neutral-errors 80 2.024 .836 N Correlation Sig.
Pair 1 Paired Samples Test Pair 1 congruent-errors neutral-errors Mean 2.1500 Paired dierences Std.
Deviation .7647 Std. Error Mean 8.550E-02 Lower 2.3202 95% Confidence Interval of the Dierence Upper .02 t 21.754 df 79 Sig.
(2-tailed)
.083

(a) The sample mean difference is -0.15, and we are 95% confident that the population mean difference will fall between -0.32 and 0.02

(b) The sample mean difference is 0.76, and we are 95% confident that the population mean difference will fall between 0.32 and 0.02

(c) The sample mean difference is 0.15, and we are 95% confident that the population mean difference will fall between 0.15 and 0.17

(d) The results are important