The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.52 litres. A sample of 10 adults water consumption in litres is taken and it has a mean of 1.76 litres and S.D of 0.18 Test whether any increase in the consumption of water?

1 state the null and the alternate hypothesis

2 which test to be performed

3 compute the value of the test statistic

at the 0.05 significance level, can we conslude the water consumption has increased?