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

Which is the most sensible answer?

(a) The sample mean difference is −0.15, and we are 95% confi dent 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% confi dent 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% confi dent that the population mean difference will fall between −0.15 and −0.17

(d) The results are important