Use the following information for items 46-48.

Debbie Ponte gives her 10 students a 10-item quiz.  The scores on the quiz were 10, 4, 7, 7, 10, 4, 3, 9, 7, 9.

46.The mean on Debbie’s quiz was:

a.6

b.7

c.8

d.9

47.The median on Debbie’s quiz was:

a.5

b.6

c.7

d.9

e.10

48.The mode on Debbie’s quiz was:

a.5

b.6

c.7

d.9

49.What is the range of the following scores:  7, 11, 12, 16, 19?

a.11

b.12

c.13

d.19

50.Which of the following are reasons that the standard deviation valuable in interpreting test scores?

1.It is easy to calculate.

2.It indicates the difference between the highest and lowest scores in a distribution.

3.It indicates how spread out the scores are around the mean.

4.It is not overly affected by extreme scores.

a.  1, 2       b.  1, 3          c.  1, 4       d.  2, 3       e.  3, 4

51.If Lisa scored a 25 on a standardized test with a mean of 20 and a standard deviation of 5, approximately what percent of the students who took the test had scores lower than hers?

a.95%

b.85%

c.75%

d.65%

52.If Nick got a score of 26 on a standardized test with a mean of 28 and a standard deviation of 6, approximately what percent of the students taking the test scored lower than he did?

a.10%

b.30%

c.45%

d.55%

53.A test given to a group of 30 students has a mean of 24 and a standard deviation of 3.  A second test given to the same group of students also had a mean of 24 but had a standard deviation of 4.  Based on this information, which of the following is the most valid conclusion.

a.The students performed better on the second test, since the standard deviation is higher.

b.The average on the second test is higher than on the first test.

c.The median on the second test is higher than on the first test.

d.The students’ scores on the second test spread out more than they did on the first test.

54.You have two sets of scores, which are as follows:

Set A:  Mean—40  Median—40  Standard deviation—4

Set B:  Mean—40  Median—41  Standard deviation—6

Of the following, which is the most accurate statement?

a.The students’ performance for both sets was equal since the means are the same.

b.The scores in Set B tend to be spread out more than the scores in Set A.

c.The students in Set B actually performed better since the standard deviation is higher than in Set A.

d.The students in Set B actually performed better since both the median and standard deviation are higher than they are in Set A.

55.On the normal curve, which of the following is represented on the vertical axis?

a.the raw score

b.the number of people obtaining a particular raw score

c.the percentile

d.the stanine

e.the z-score