. Holmes, Malone, and Redenbach (2008) found that good readers and good spellers correctly read 90.2 ± 3 (M ± SD) words from a spelling list. On the other hand, average readers and poor spellers correctly read 70.8 ± 3.2 (M ± SD) words from the same spelling list. Assuming these data are normally distributed, answer the following ? What percentage of participants correctly read a least 92 words in the good readers and good spellers group? ? What percentage of participants correctly read a least 65 words in the average readers and poor spellers group?
. Holmes, Malone, and Redenbach (2008) found that good readers and good spellers correctly read 90.2 ± 3 (M ± SD) words from a spelling list. On the other hand, average readers and poor spellers correctly read 70.8 ± 3.2 (M ± SD) words from the same spelling list. Assuming these data are normally distributed, answer the following ? What percentage of participants correctly read a least 92 words in the good readers and good spellers group? ? What percentage of participants correctly read a least 65 words in the average readers and poor spellers group?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
Transcribed Image Text:Holmes, Malone, and Redenbach (2008) found that
good readers and good spellers correctly read 90.2 ± 3
(MSD) words from a spelling list.
On the other hand, average readers and poor spellers
correctly read 70.8 ± 3.2 (M ± SD) words from the same
spelling list. Assuming these data are normally
distributed, answer the following
? What percentage of participants correctly read at
least 92 words in the good readers and good
spellers group?
? What percentage of participants correctly read at
least 65 words in the average readers and poor
spellers group?
Expert Solution
Step 1: Determine the given variables.
The question is about normal distribution.
Given :
Good readers and good spellers :
Population mean no. of words that are correctly read ( 
) = 90.2
Population standard deviation of no. of words that are correctly read ( 
) = 3
Average readers and poor spellers :
Population mean no. of words that are correctly read ( 
) = 70.8
Population standard deviation of no. of words that are correctly read ( 
) = 3.2
To find :
1 ) % of participants correctly read at least 92 words in the good readers and good spellers group.
2 ) % of participants correctly read at least 65 words in the average readers and poor spellers group.
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