Problem:
You have the following correlation matrix:
JHF IQ, Wechsler IQ, SB IQ, JHF IQ2, JHF IQ3
JHF IQ 1.00
WISC IQ .89 1.00
SB IQ .87 .95 1.00
JHF IQ2 .85 .83 .80 1.00
JHF IQ3 .46 .34 .25 .64 1.00
The JHF IQ is an intelligence test that I [the instructor] have developed. The JHF IQ2 and JHF IQ3 are scores from the same people on the JHF IQ given at 2 months after the first testing and at 9 months after the original testing. The SB IQ is the Stanford Binet. What does this data suggest about the validity and reliability of the JHF IQ? Can I retire on the profits I will make? Support your answer.