2. Use the data on Sheet 2 to construct a 95% confidence interval for the mean difference of the paired data.

ID	CORNFLK (mmol/L)	OATBRAN (mmol/L)
1	4.61	3.84
2	6.42	5.57
3	5.4	5.85
4	4.54	4.8
5	3.98	3.68
6	3.82	2.96
7	5.01	4.41
8	4.34	3.72
9	3.8	3.49
10	4.56	3.84
11	5.35	5.26
12	3.89	3.73
13	2.25	1.84
14	4.24	4.14