In one research, the average height of Filipinos is 156.41 cm. Suppose a random sample of 25 Filipino citizens were selected and it was determined that their mean height is 161.2 cm and the standard deviation is 15 cm. Using 0.01 level of significance, can it be concluded that the average height of Filipinos has increased? Assume normality over the population.

_____17. What is the level of significance? A. 0.05
B. 0.10
C. 0.01
D. 0.025

_____18. What test statistic should be used?
A. t- test
B. z- test
C.x
D. o

_____19. Compute the test statistic.
A. 0.55
B. 1.50
C. 1.59
D. 1.60

_____20. Determine the critical value.
A. 2.485
B. 2.492
C. 2.500
D. 2.792

_____21. Based on the critical value and the computed value of the test statistic, what conclusion can be drawn?
A. Reject .
B. Do not reject
C. The critical value is low.
D.Ho ≠ Ha​