Correction
#1
On page 70, the answer to question #3.32 is Sd = 39.11 and Variance = 1530.30
Correction #2
On page 92, question 4.16 should read "Based on the z-score calculated in question 4.15,..."
Correction #3
On page 92, question 4.18 should read "Based on the z-score calculated in question 4.17,..."
Correction #4
On page 94, the answer to question 4.21 (f.) is z = +1.25.
Correction #5
On page 94, the answer to question 4.23 (f.) is T = 38.
Correction #6
On page 108, the last paragraph should read Calculation 5.2 shows how to use the formula to obtain a Spearman rank-order correlation coefficient.
Correction #7
On page 109, Table 5.4 should read:
Table 5.4. Twelfth Graders’ GPAs and Combined Sat-I Scores
|
Student |
GPA |
Rank |
SAT-I |
Rank |
D |
D2 |
|
John Henry |
3.97 |
1 |
1180 |
3 |
-2 |
4 |
|
Kate |
3.85 |
2.5* |
1130 |
6 |
-3.50 |
12.25 |
|
Wyatt |
3.85 |
2.5* |
1070 |
8 |
-5.50 |
30.25 |
|
Mattie |
3.67 |
4 |
1180 |
3 |
1 |
1 |
|
Virgil |
3.52 |
5 |
1140 |
5 |
0 |
0 |
|
Johnny |
3.42 |
6 |
1290 |
1 |
5 |
25 |
|
Josephine |
3.36 |
7 |
960 |
9 |
-2 |
4 |
|
Billy |
3.24 |
8 |
1180 |
3 |
5 |
25 |
|
Jack |
2.74 |
9 |
1110 |
7 |
2 |
4 |
|
Ike |
2.56 |
10 |
720 |
10 |
0 |
0 |
|
|
|
|
|
|
|
Sum D2 = 105.50 |
· When ties occur on x or y, assign the average of the rank involved to each score, e.g., 2 + 3 = 2.50.
|
Calculation 3. 6
Sum (D2) STEP 1 6
Sum (105.5) ___________________________________________ STEP 2 633 STEP 3
|
Calculation 3 shows that rs = 0.331, which is interpreted as a weak positive relationship between GPA and combined SAT-I scores.
Correction #8
The paragraph on Page 123 should read:
“Calculation 6.1 shows that r = 0.756, which translates to a strong positive concurrent validity coefficient between the Stanford-Binet Intelligence Test and the CAT. Although the validity coefficient is strong, it is below 0.80, and therefore it is not acceptable to use the CAT group test as a substitute for the Stanford-Binet Intelligence Test.”