Answer:
Step-by-step explanation:
a) [tex]H_o: mu =80\\H_a: mu not equals 80\\[/tex]
b) Sample mean is the average of sample
c) std deviation of the sample
d) std dev/sq rt n
e) (sample mean - mu)/std error
f) p value = prob with test statistic
g) If p < alpha, reject H0.
h) If rejected, there is evidence that significant difference between population mean and sample mean.