If all the possible pairs of sample means were obtained from a single
population, the mean of the distribution of differences would be
a. a statistic
b. a parameter
c. identical with the mean of the distribution of means
d. equal to one-sixth of the range
Question 2
A researcher in the area of cognitive functioning has designed a new test
of creativity, called the CIA test (Cognitive Information Assessment). A random sample of ten, five-year-old children is selected and given the test.
A week later the same test was administered for a second time.
Estimate the reliability of this test.
Subject Test Retest
X Y
1 . 30 33
2 . 10 15
3 . 20 18
4 . 18 20
5 . 22 16
6 . 23 21
7 . 17 15
8 . 20 22
9 . 25 28
10 . 15 15
What will be an ideal response?
A small sample of the great diversity of seed sizes and shapes.
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