Question

Test scores are normally distributed with mean of 500 and standard deviation of 80. Find the percent of test scores above 650. data set has normal distribution with mean of 120 and standard deviation of 15. Find the data value at the 85th percentile

Name: mean of 500 and standard deviation of 80 find the percent of test test scores are normally distributed with scores above 650 data set has normal distribution with mean of 120 and standard 18632
Uploaded: 2023-08-22T18:21:13-08:00
Duration: 2 min 12 s
Channel: Pritesh Ranjan
Description: mean of 500 and standard deviation of 80 find the percent of test test scores are normally distributed with scores above 650 data set has normal distribution with mean of 120 and standard 18632

          Test scores are normally distributed with mean of 500 and standard deviation of 80. Find the percent of test scores above 650.
data set has normal distribution with mean of 120 and standard deviation of 15. Find the data value at the 85th percentile

Added by Rosa C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Pritesh Ranjan

08/22/2023

Step 1

- We want to find the percentage of test scores that are above 650. - To do this, we need to standardize the score using the formula z = (x - μ) / σ, where x is the score, μ is the mean, and σ is the standard deviation. - Plugging in the values, we get z = (650 - Show more…

Show all steps

Thanks for your feedback!

Test scores are normally distributed with mean of 500 and standard deviation of 80. Find the percent of test scores above 650. data set has normal distribution with mean of 120 and standard deviation of 15. Find the data value at the 85th percentile