A researcher at the University of Washington medical school believes that energy drink consumption may increase heart rate. Suppose it is known that heart rate (in beats per minute) is normally distributed with an average of 70 bpm for adults. A random sample of 25 adults was selected and it was found that their average heartbeat was 73 bpm after energy drink consumption, with a sample standard deviation of 7 bpm. Test the hypotheses at the 5% significance level to determine if we can conclude that energy drink consumption increases heart rate.