Basic physcology-help needed???

Question

1) IN ANY DISTRIBUTION OF SCORES, AN EQUAL NUMBER OF SCORES ARE BOTH GREATER THAN AND LESS THAN:

A)THE MEDIAN

B)THE MODE

C)THE MEAN

D)ALL OF THE ABOVE

2)VARIATION IS THE CENTRAL TENDENCY AS_____ IS TO ____.

A)RANGE;MEDIAN

B)FREQUENCY DISTRIBUTION;PERCENTILE RANK

C)MODE;MEAN

D)SCATTERPLOT;BAR GRAPH

E)CORRELATION;SCATTERPLOT

3. PROFESSOR WOO NOTICED THAT THE DISTRIBUTION OF STUDENTS SCORES ON HER LAST BIOLOGY TEST HAD AN EXTREMELY SMALL STANDARD DEVIATION. THIS INDICATED THAT THE:

A)TEST WAS GIVEN TO A VERY SMALL CLASS OF STUDENTS

B)TEST WAS A POOR MEASURE OF THE STUDENTS KNOWLEDGE

C)MEAN TEST SCORES WAS LOWER THAN THE MEDIAN SCORE

D)STUDENTS GENERALLY PERFORMED WELL ON THE TEST

E)STUDENTS SCORES TENDED TO BE VERY SIMILAR TO ONE ANOTHER.

Answer 1

1.  A.  Median (50% cut point of a distribution)

2.  E.  (var is a measure of CT in the same way that a correlation coefficient is a numerical description of a scatterplot)

3.  E.  A low SD means that scores varied very little

~M~