MATH SOLVE

3 months ago

Q:
# The scores on a standardized test are normally distributed with a mean of 500 and a standard deviation of 60. Jake scored 520 on the test. What percent of students scored below Jake? Include a step by step description of the process you used to find that percentage. (Round your answer to the nearest whole number.)

Accepted Solution

A:

Answer:63 percent student scored below Jake.Step-by-step explanation:For finding the percentile
Step 1: Subtracting mean from Jake’s score
=520-500
=20
Step 2: Calculating z-score
The z-Score is found by dividing the difference obtained in step 1 by SD of the data
z-score= 20/60
z-score=0.333
Step 3: Converting the z-score to percentile
The z-score will be converted to percentile using the z-score to percentile conversion table, the value of percentile for 0.3333 is 63rd . So, 63 percent students scored below Jake.