2. According to research conducted in Ankara, the average person watched 5 hours of television per day in 2022. A random sample of 20 people provided the following number of hours of television watched per day in 2023.
5 6 7 6 7
3 4 4 9 5
8 7 10 6 4
4 6 6 5 8
a) At the 10% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day in 2023 differs from that in 2022?
b) At the 1% significance level, do the data provide sufficient evidence to conclude that the amount of television watched per day in 2023 is higher than in 2022?