how would to do null and alternative hypothesis for this situation Scenario:

how would to do null and alternative hypothesis for this situation
Scenario: Lucy wants to know her fourth grade daughter, Monica, scored on a test of reading comprehension compared to the population of other fourth graders in the school district. Luckily Lucy has taken this course and knows that z-scores will help her understand Monica’s reading score in relation to the population.
data as follows:
-Monica’s reading comprehension score = 121
-Mean Fourth grade reading comprehension score = 147

Standard Deviation of the fourth grade’s reading comprehension = 14.8

 
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