Question

4. The standard deviation of a group of 1000 high school grades was 11%\nand the mean grade 78%. Assuming the distribution to be normal, find\na) how many grades are above 90% b) below 35% c) between 70 and 86.

Name: 4. The standard deviation of a group of 1000 high school grades was 11% and the mean grade 78%. Assuming the distribution to be normal, find a) how many grades are above 90% b) below 35% c) between 70 and 86.
Uploaded: 2022-06-28T10:46:51-08:00
Duration: 2 min 53 s
Channel: Sri K
Description: 4. The standard deviation of a group of 1000 high school grades was 11% and the mean grade 78%. Assuming the distribution to be normal, find a) how many grades are above 90% b) below 35% c) between 70 and 86.

          4. The standard deviation of a group of 1000 high school grades was 11%\nand the mean grade 78%. Assuming the distribution to be normal, find\na) how many grades are above 90% b) below 35% c) between 70 and 86.

$4. The standard deviation of a group of 1000 high school grades was 11%\nand the mean grade 78%. Assuming the distribution to be normal, find\na) how many grades are above 90% b) below 35% c) between 70 and 86.$

Added by Angie B.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Sri K

06/28/2022

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Step 1: We are given that the mean grade is 78% and the standard deviation is 11%. Show more…

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4. The standard deviation of a group of 1000 high school grades was 11% and the mean grade 78%. Assuming the distribution to be normal, find a) how many grades are above 90% b) below 35% c) between 70 and 86.