Consider the following hypothesis test Ho: >= 20 Ha: < 20 A
sample of 50 provided a sample mean of 19.4. The population
standard deviation is 2. a- compute the value of the test
statistic? I got 2.12 b- what is the p-value? is it .017 or is
it .9830 because it is upper tail c- using alpha=.05, what is
your conclusion? d- what is the rejection rule using critical
value?