The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.4 liters. A health campaign promotes the consumption of at least 2.0 liters per day. A sample of 10 adults after the campaign shows the following consumption in liters: 1.5 1.6 1.5 1.4 1.9 1.4 1.3 1.9 1.8 1.7 At the 0.05 significance level, can we conclude that water consumption has increased?