UNAM is known to have a completion rate of 35% with a varianceof 6.25%. A Research from
NRCT claims that the variance of UNAM completion rate is not asreported. A sample of 26
students found to have a completion rate of 37% with a variance of7.29%. (Show all your work
and hypothesis clear steps)
a) Test the Researcher's claims at the 90% level of confidence[14]
b) Construct a 95% confidence interval for the population standarddeviation. [6]
