EXERCISES 2 1.) Celyn is among the 1,500 students of the school. If Celyn's IQ score based on the Standard-Binet test is 105, what is her percentile rank?ENRICHMENT ACTIVITY In the province of Iloilo, the set of recorded midday temperature readings for the month of February is believed to follow a normal distribution. It is known that 10.05% of recorded temperature readings were under 28"C, and that 33% were above 309. Determine the mean and standard deviation of this normal distribution