Test the hypothesis .... A random sample of size 20 from a normal population give a sample mean of 42 and sample
standard deviation of 6. Test the hypothesis that the population mean is 44 at 5 % level of
significance.
First calculate the statistic
$$t=\frac{44-42}{6}\sqrt{20}=1.49$$
then decide, using the fact that $t\sim \mathcal{T}_{(19)}$
First calculate the statistic
$$t=\frac{44-42}{6}\sqrt{20}=1.49$$
then decide, using the fact that $t\sim \mathcal{T}_{(19)}$