A researcher investigating ‘Pygmalion in the classroom’ measured teachers’ perceptions of male and female students’ mathematical abilities. She wanted to test whether teachers perceived males as being better at maths by comparing teachers’ mean ratings of 97 male and female students. Based on the output, what action should the researcher take before testing whether the mean teacher perceptions are different for male and female students?
A. Use bootstrapping.
B. Automatically delete extreme scores.
C. Take no action.
D. Log-transform the data.
Answer: C
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Fluoride affects tooth development in all the following ways EXCEPT:
A. it improves resistance to decay B. it causes brown staining if consumed in high doses C. it increases the strength of tooth enamel D. it slows calcium absorption
If your value of a statistic like the t-test falls in the ______ area of this distribution, you will ______ the null hypothesis because the probability of the statistic is ______.
a. shaded; reject; high
b. shaded; not reject; high
c. unshaded; reject; low
d. unshaded; not reject; high
Constructive play is
a. only engaged in by school-aged children. b. only engaged in by boys. c. when children use objects or materials to make other things. d. appropriate only for preschool children.
Since colonial times in this country, formal education of some kind has almost always been available to
What will be an ideal response?