Scientists are conducting an experiment to test whether drinking coffee lowers blood sugar levels. They sample 10 people who do not drink coffee to start a 1-month trial run of drinking 3 coffee cups a day. After the trial run, the blood sugar levels were measured and compared with their control values. If the data is below, can we conclude that drinking coffee effects blood sugar levels within a 5% significance level?

Patient Before After 190 185 2 195 196 3 180 188 4 210 202 5 215 200 6 200 189 230 215 8 240 220