3. Suppose that the psychologist in the previous question predicted that girls have higher verbal scores at age 4. What value of t would be necessary to conclude that girls score significantly higher using one- tailed test with a = 0.01?

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3. Suppose that the psychologist in the previous question predicted that girls have higher verbal scores at
age 4. What value of t would be necessary to conclude that girls score significantly higher using one-
tailed test with a = 0.01?
COLO04
Transcribed Image Text:3. Suppose that the psychologist in the previous question predicted that girls have higher verbal scores at age 4. What value of t would be necessary to conclude that girls score significantly higher using one- tailed test with a = 0.01? COLO04
2. A developmental psychologist would like to examine the difference in verbal skills for 6-year-old girls
compared with 6-year-old boys. A sample of n = 5 girls and n = 5 boys is obtained, and each child is
given a standardized verbal abilities test. The data are as follows:
Are these data sufficient to indicate a significant difference in verbal skills
for 6-year-old girls and 6-year-old boys? Test at the 0.05 level of
significance.
GIRLS
BOYS
X = 83
Ss = 200
x = 71
SS = 120
Transcribed Image Text:2. A developmental psychologist would like to examine the difference in verbal skills for 6-year-old girls compared with 6-year-old boys. A sample of n = 5 girls and n = 5 boys is obtained, and each child is given a standardized verbal abilities test. The data are as follows: Are these data sufficient to indicate a significant difference in verbal skills for 6-year-old girls and 6-year-old boys? Test at the 0.05 level of significance. GIRLS BOYS X = 83 Ss = 200 x = 71 SS = 120
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