Normal Probability Calculations. The final exam scores in STAT2331 class are normally distributed with mean =...

Question

Question

Normal Probability Calculations. The final exam scores in STAT2331 class are normally distributed with mean = 85 and sd=3.5.

a. What is the percentage that a student exam score is less than 70?

b. What is the percentage that a student exam score is greater than 90?

c. What is the cutt-off score to identify the top 5%?

Provide R code Plz

math Statistics-And-Probability

Answer 1

Answer #1

Answer 2