he accompanying data on x = head circumference z score (a comparison score with peers of the same age - a positive score suggests a larger size than for peers) at age 6 to 14 months and y = volume of cerebral grey matter (in ml) at age 2 to 5 years were read from a graph in an article. Cerebral Grey Matter (ml) 2-5 yr Head Circumfer- ence z Scores at 6-14 Months 680 -0.73 690 1.2 700 -0.28 720 0.27 740 0.32 740 1.5 750 1.1 750 2.0 760 1.1 780 1.1 790 2.0 810 2.1 815 2.8 820 2.2 825 0.92 835 2.35 840 2.3 845 2.2 (a) What is the value of the correlation coefficient? (Give the answer to two decimal places.) r = (b) Find the equation of the least-squares line. (Give the answer to two decimal places.) y= (c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.8. (Give the answer to two decimal places.)
he accompanying data on x = head circumference z score (a comparison score with peers of the same age - a positive score suggests a larger size than for peers) at age 6 to 14 months and y = volume of cerebral grey matter (in ml) at age 2 to 5 years were read from a graph in an article. Cerebral Grey Matter (ml) 2-5 yr Head Circumfer- ence z Scores at 6-14 Months 680 -0.73 690 1.2 700 -0.28 720 0.27 740 0.32 740 1.5 750 1.1 750 2.0 760 1.1 780 1.1 790 2.0 810 2.1 815 2.8 820 2.2 825 0.92 835 2.35 840 2.3 845 2.2 (a) What is the value of the correlation coefficient? (Give the answer to two decimal places.) r = (b) Find the equation of the least-squares line. (Give the answer to two decimal places.) y= (c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.8. (Give the answer to two decimal places.)
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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The accompanying data on x = head circumference z score (a comparison score with peers of the same age - a positive score suggests a larger size than for peers) at age 6 to 14 months and y = volume of cerebral grey matter (in ml) at age 2 to 5 years were read from a graph in an article.
Cerebral Grey Matter (ml) 2-5 yr |
Head Circumfer- ence z Scores at 6-14 Months |
680 | -0.73 |
690 | 1.2 |
700 | -0.28 |
720 | 0.27 |
740 | 0.32 |
740 | 1.5 |
750 | 1.1 |
750 | 2.0 |
760 | 1.1 |
780 | 1.1 |
790 | 2.0 |
810 | 2.1 |
815 | 2.8 |
820 | 2.2 |
825 | 0.92 |
835 | 2.35 |
840 | 2.3 |
845 | 2.2 |
(a) What is the value of the correlation coefficient ? (Give the answer to two decimal places.)
r =
(b) Find the equation of the least-squares line. (Give the answer to two decimal places.)
y=
(c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.8. (Give the answer to two decimal places.)
r =
(b) Find the equation of the least-squares line. (Give the answer to two decimal places.)
y=
(c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.8. (Give the answer to two decimal places.)
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