14. Whitesh have lengths that vary according to a normal distribution. We want to see if there is any evidence that the population mean length it is not 9 cm. A simple random sample of 10 Whitesh has sample mean length 8.5 cm and sample standard deviation 1.2 cm. Let u denote the mean length of all Whitesh. Test H0 : u = 9 against a suitable alternative. What do you conclude, using 04 = 0.05? (a) accept the null hypothesis (b) reject the null hypothesis because the sample mean is not equal to 9 (c) * fail to reject the null hypothesis ((1) reject the null hypothesis