The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in observing infants over time. It is approximately normal with a mean of 100 and a standard deviation of 16. Complete parts a through c. a. What proportion of children has an MDI of (i) at least 130? (ii) at least 90? (1) The proportion of children having an MDI of at least 130 is 0.0301. (Round to four decimal places as needed.) (ii) The proportion of children having an MDI of at least 90 is 0.7357. (Round to four decimal places as needed.) b. Find the MDI score that is the 98th percentile. The 98th percentile MDI score is 132.8. (Round to two decimal places as needed.) c. Find the MDI score such that only 2% of the population has an index below it. 2% of the population have an MDI score below (Round to two decimal places as needed.)
The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in observing infants over time. It is approximately normal with a mean of 100 and a standard deviation of 16. Complete parts a through c. a. What proportion of children has an MDI of (i) at least 130? (ii) at least 90? (1) The proportion of children having an MDI of at least 130 is 0.0301. (Round to four decimal places as needed.) (ii) The proportion of children having an MDI of at least 90 is 0.7357. (Round to four decimal places as needed.) b. Find the MDI score that is the 98th percentile. The 98th percentile MDI score is 132.8. (Round to two decimal places as needed.) c. Find the MDI score such that only 2% of the population has an index below it. 2% of the population have an MDI score below (Round to two decimal places as needed.)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
Related questions
Question
100%
Transcribed Image Text:The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in observing infants over time. It is approximately normal with a mean of 100
and a standard deviation of 16. Complete parts a through c.
a. What proportion of children has an MDI of (i) at least 130? (ii) at least 90?
(1) The proportion of children having an MDI of at least 130 is 0.0301
(Round to four decimal places as needed.)
2
(ii) The proportion of children having an MDI of at least 90 is 0.7357.
(Round to four decimal places as needed.)
b. Find the MDI score that is the 98th percentile.
The 98th percentile MDI score is 132.8
(Round to two decimal places as needed.)
c. Find the MDI score such that only 2% of the population has an index below it.
View an example Get more help -
W
2% of the population have an MDI score below.
(Round to two decimal places as needed.)
S
X
H
mmand
ای ایرانی
3
20
D
C
$
R
F
%
5
V
55
T
G
스
6
B
Y
H
&
44
F7
U
N
8
Dil
1
M
9
K
DD
19
O
1
L
9
F10
P
command
Clear all
:
P11
f
[
option
?
Check answer
11
(320)
F12
1
Y
delete
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON