Solve the problem Write your complete solution on the boxes below. 25points
The Head of the Math Department announced that the mean scope of Grade 9 students in the first periodic
examination in Mathematics was 89 and the standard deviation was 12. One students who believed that the mean
score was less than this, randomly
selected 34 students and computed their mean score She obtained a mean score
of 85. At 0.01 level of significance, test the student's belief.
a State the null and alternative hypothesis.
c Compute for test statistic
b. Identify the level of significance
d. Find the critical value
e. Conclusion
Signature over printed name of the parent
Prepared by: ROLLY A DEVIS

pa help naman po need ko po ng matinong sagot,epapasa kuna po kase ito sa friday morning.salamat po ​