1. Mehl (2007) published a study in the journal Science reporting the results of
ID: 3304783 • Letter: 1
Question
1. Mehl (2007) published a study in the journal Science reporting the results of an extensive study of 396 men and women comparing the number of words uttered per day by each sex. He found that on average women uttered 16,215 words a day and men uttered 15,669 words a day. The effect size calculated on the basis of his findings is Cohen's d = 0.02. According to Cohen's conventions for interpreting d, this effect is:
small.
medium.
large.
so small as to be considered virtually no effect.
2. In a paired-samples test, the comparison (sampling) distribution is a distribution of:
mean difference scores.
raw score differences.
median distribution scores.
means.
3. What is the probability we will not make a Type II error?
statistical power.
effect size
strength
interval estimate
4. A high degree of overlap between two distributions of approximately 95% is most likely to result in a(n). ________ effect size.
small
medium
large
unconventional
a.small.
b.medium.
c.large.
d.so small as to be considered virtually no effect.
2. In a paired-samples test, the comparison (sampling) distribution is a distribution of:
a.mean difference scores.
b.raw score differences.
c.median distribution scores.
d.means.
3. What is the probability we will not make a Type II error?
a.statistical power.
b.effect size
c.strength
d.interval estimate
4. A high degree of overlap between two distributions of approximately 95% is most likely to result in a(n). ________ effect size.
a.small
b.medium
c.large
d.unconventional
Explanation / Answer
Q1. d =0.2 , this effect is small
Q 2. a. mean difference scores.
Q3. c. Strength
Q4. small
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