Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children? child IQ scr 1 91 2 111 3 97 4 95 5 96 6 95 7 95 8 96 9 94 10 93 11 95 12 92 13 96 14 91 15 97 16 93 17 92 18 99 19 93 20 97 21 85 22 94 23 96 24 95 25 96 A. Is the dependent variable categorical or quantitative? A B. What is the mean IQ for the sample? B C. What is the sample standard deviation? C D. What is the population mean?
Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children?
|
child |
IQ scr |
|
1 |
91 |
|
2 |
111 |
|
3 |
97 |
|
4 |
95 |
|
5 |
96 |
|
6 |
95 |
|
7 |
95 |
|
8 |
96 |
|
9 |
94 |
|
10 |
93 |
|
11 |
95 |
|
12 |
92 |
|
13 |
96 |
|
14 |
91 |
|
15 |
97 |
|
16 |
93 |
|
17 |
92 |
|
18 |
99 |
|
19 |
93 |
|
20 |
97 |
|
21 |
85 |
|
22 |
94 |
|
23 |
96 |
|
24 |
95 |
|
25 |
96
|
A. Is the dependent variable categorical or quantitative? A
B. What is the mean IQ for the sample? B
C. What is the sample standard deviation? C
D. What is the population mean?
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