Question

the students in high school enter school between 9:45am to 10am. the timing of the 400 students entering the school are normally distributed. with a mean of 9:55 and a standard deviation of 1 minute. how many students enter before 9:55am​

Answer 1

Answer:64 students

Explanation:

using the empirical rule, we know that 34% of a normal distribunion is below the mean but above 1 standard deviation. This means that 16% of the students enter before 9:55. Take 16% of 400 and you get the amount of students in before 9:55