A survey of the population of 51 students in Psych 311 asks how many credits students are taking and obtains the following normally-distributed results: EX = 686 and EX²= 9832.92. !!

30-What is the 25th percentile? (Hint: This is the same as asking what score separates the bottom 25% of the distribution from the top 75%.)

Extracted text: A survey of the population of 51 students in Psych 311 asks how many credits students are taking and obtains the following normally-distributed results: EX = 686 and EX²= 9832.92. !!