Question 1

"Analysis of analyses" refers to

Accepted Answer

A)  analysis of variance. 
B)  Pearson's product moment correlation. 
C)  meta-analysis. 
D)  standardization scores. 
A)  analysis of variance. 
B)  Pearson's product moment correlation. 
C)  meta-analysis. 
D)  standardization scores. C

Question 2

Exhibit 6-4: Use the data for the following questions.Score 1: 34, 40, 42, 24, 30; Score 2: 40, 38, 41, 49, 42
-Refer to Exhibit 6-4.What percent of the variance of scores in Group 1 is common with the variance of scores in Group 2?

Accepted Answer

A)  56 percent 
B)  69 percent 
C)  72 percent 
D)  None of these are true. 
A)  56 percent 
B)  69 percent 
C)  72 percent 
D)  None of these are true. B

Question 3

Exhibit 6-5: Indicate your choice of statistics for solving the following questions.
-Refer to Exhibit 6-5.We want to see how scores on this examination are related to scores on another examination.

Accepted Answer

A)  mean 
B)  standard deviation 
C)  z-score 
D)  Pearson's r 
A)  mean 
B)  standard deviation 
C)  z-score 
D)  Pearson's r D

Question 4

A distribution with many high scores and a few scattered low scores is a ____ distribution:

Accepted Answer

A)  symmetrical. 
B)  positively skewed. 
C)  negatively skewed. 
A)  symmetrical. 
B)  positively skewed. 
C)  negatively skewed.

Question 5

Under a scattergram, there is a notation that the coefficient of correlation is .06.This means that

Accepted Answer

A)  most of the cases are plotted within a range of 6 percent above or below a sloping line in the scattergram. 
B)  plus and minus 6 percent from the mean includes about 68 percent of the cases. 
C)  there is a negligible correlation between the two variables. 
D)  most of the data plotted fall into a narrow band 6 percent wide. 
A)  most of the cases are plotted within a range of 6 percent above or below a sloping line in the scattergram. 
B)  plus and minus 6 percent from the mean includes about 68 percent of the cases. 
C)  there is a negligible correlation between the two variables. 
D)  most of the data plotted fall into a narrow band 6 percent wide.

Question 6

Exhibit 6-2: Use the distribution for the following questions.51, 52, 55, 56, 57, 57, 57, 58, 59, 59, 60, 60, 60
-Refer to Exhibit 6-2.The most frequently occurring score is

Accepted Answer

A)  57. 
B)  75.33. 
C)  52.4 
D)  none of these are true. 
A)  57. 
B)  75.33. 
C)  52.4 
D)  none of these are true.

Question 7

A study of a new reading training program achieved, with 100 subjects, the following results: experimental group mean = 20.25 (SD = 2.28) and control group mean = 25.14 (SD = 4.75).However, a second study with 541 subjects found experimental group mean = 28.81 (SD = 2.56) and control group mean = 26.62 (SD 2.01).

Accepted Answer

A)  The first study had a higher effect size. 
B)  The second study had a higher effect size. 
C)  Both studies had similar effect sizes. 
D)  None of these are true. 
A)  The first study had a higher effect size. 
B)  The second study had a higher effect size. 
C)  Both studies had similar effect sizes. 
D)  None of these are true.

Question 8

The denominator of the Smith and Glass effect size is

Accepted Answer

A)  the standard deviation of the control group. 
B)  the difference between means. 
C)  a weighted estimate of the population mean based on the means of both groups. 
D)  a weighted estimate of the population standard deviation based on the variability within both groups. 
A)  the standard deviation of the control group. 
B)  the difference between means. 
C)  a weighted estimate of the population mean based on the means of both groups. 
D)  a weighted estimate of the population standard deviation based on the variability within both groups.

Question 9

If every Y-score is exactly one-half its paired X-score, we have ____.

Accepted Answer

A)  A Pearson's product moment correlation of +1.00 
B)  A Pearson's product moment correlation between zero and +1.00 
C)  A Pearson's product moment correlation of zero 
D)  A Pearson's product moment correlation between zero and -1.00 
E)  A Pearson's product moment correlation of -1.00 
A)  A Pearson's product moment correlation of +1.00 
B)  A Pearson's product moment correlation between zero and +1.00 
C)  A Pearson's product moment correlation of zero 
D)  A Pearson's product moment correlation between zero and -1.00 
E)  A Pearson's product moment correlation of -1.00

Question 10

____ would be associated with a scattergram with a moderately wide band of dots going from upper left to lower right.

Accepted Answer

A)  A Pearson's product moment correlation of +1.00 
B)  A Pearson's product moment correlation between zero and +1.00 
C)  A Pearson's product moment correlation of zero 
D)  A Pearson's product moment correlation between zero and -1.00 
E)  A Pearson's product moment correlation of -1.00 
A)  A Pearson's product moment correlation of +1.00 
B)  A Pearson's product moment correlation between zero and +1.00 
C)  A Pearson's product moment correlation of zero 
D)  A Pearson's product moment correlation between zero and -1.00 
E)  A Pearson's product moment correlation of -1.00

Question 11

When we have statistically significant results, what does an effect size tell us?

Accepted Answer

When we have statistically significant r

Question 12

Compared with stanine scores, z-scores have the advantage of being

Accepted Answer

A)  all positive. 
B)  more precise. 
C)  easier to learn to interpret. 
D)  based on rank rather than raw score. 
A)  all positive. 
B)  more precise. 
C)  easier to learn to interpret. 
D)  based on rank rather than raw score.

Question 13

Multiplying all raw scores by two will

Accepted Answer

A)  double the z-scores. 
B)  halve the z-scores. 
C)  not change the z-scores. 
A)  double the z-scores. 
B)  halve the z-scores. 
C)  not change the z-scores.

Question 14

The sum of the z-scores squared in any distribution is equal to

Accepted Answer

A)  zero. 
B)  1.00. 
C)  cN. 
D)  N2. 
A)  zero. 
B)  1.00. 
C)  cN. 
D)  N2.

Question 15

A negative z score is always

Accepted Answer

A)  above the median. 
B)  below the median. 
C)  a good score. 
D)  a poor score. 
E)  below the mean. 
A)  above the median. 
B)  below the median. 
C)  a good score. 
D)  a poor score. 
E)  below the mean.

Question 16

The z-scores for X and Y variables are exactly the same except they have opposite signs.The coefficient of determination is

Accepted Answer

A)  0.00. 
B)  -1.00. 
C)  +1.00. 
D)  not possible to compute with this information. 
A)  0.00. 
B)  -1.00. 
C)  +1.00. 
D)  not possible to compute with this information.

Question 17

Why might you prefer to teach a fifth grade class with a mean grade level equivalent of 5.1 and a standard deviation of 1.9 rather than a class with a mean grade level equivalent of 5.1 and a standard deviation of 3.2?

Accepted Answer

You might prefer to teach a fifth-grade

Question 18

What are the advantages and disadvantages of percentile ranks?

Accepted Answer

Percentile ranks have both advantages an

Question 19

Descriptive statistics are used to:

Accepted Answer

A)  tell us how accurately we can infer from the part to the whole. 
B)  Enable us to organize, summarize and describe our observations. 
C)  Both a and b 
A)  tell us how accurately we can infer from the part to the whole. 
B)  Enable us to organize, summarize and describe our observations. 
C)  Both a and b

Question 20

Which measure of central tendency is best for describing this distribution? 13, 13, 13, 20, 21, 24, 25, 25, 27, 28, 28, 29, 30, 32, 31, 60

Accepted Answer

A)  Mode 
B)  Median 
C)  Mean 
A)  Mode 
B)  Median 
C)  Mean

"Analysis of analyses" refers to

Exhibit 6-4: Use the data for the following questions.Score 1: 34, 40, 42, 24, 30; Score 2: 40, 38, 41, 49, 42 -Refer to Exhibit 6-4.What percent of the variance of scores in Group 1 is common with the variance of scores in Group 2?

Exhibit 6-5: Indicate your choice of statistics for solving the following questions. -Refer to Exhibit 6-5.We want to see how scores on this examination are related to scores on another examination.

A distribution with many high scores and a few scattered low scores is a ____ distribution:

Under a scattergram, there is a notation that the coefficient of correlation is .06.This means that

Exhibit 6-2: Use the distribution for the following questions.51, 52, 55, 56, 57, 57, 57, 58, 59, 59, 60, 60, 60 -Refer to Exhibit 6-2.The most frequently occurring score is

The denominator of the Smith and Glass effect size is

If every Y-score is exactly one-half its paired X-score, we have ____.

____ would be associated with a scattergram with a moderately wide band of dots going from upper left to lower right.

When we have statistically significant results, what does an effect size tell us?

Compared with stanine scores, z-scores have the advantage of being

Multiplying all raw scores by two will

The sum of the z-scores squared in any distribution is equal to

A negative z score is always

The z-scores for X and Y variables are exactly the same except they have opposite signs.The coefficient of determination is

Why might you prefer to teach a fifth grade class with a mean grade level equivalent of 5.1 and a standard deviation of 1.9 rather than a class with a mean grade level equivalent of 5.1 and a standard deviation of 3.2?

What are the advantages and disadvantages of percentile ranks?

Descriptive statistics are used to:

Which measure of central tendency is best for describing this distribution? 13, 13, 13, 20, 21, 24, 25, 25, 27, 28, 28, 29, 30, 32, 31, 60

The Nature of Scientific Inquiry

The Scientific Approach in Education

he Research Problem

Reviewing the Literature

The Hypothesis

Sampling and Inferential Statistics

Tools of Research

Validity and Reliability

Experimental Research

Experimental Research Design

Ex Post Facto Research

Correlation Research

Survey Research

Defining and Designing Qualitative Research

Types of Qualitative Research

Analyzing and Reporting Qualitative Research

Action Research

Mixed Methods Research

Guidelines for Writing Research Proposals

Interpreting and Reporting Results of Quantitative Research

Filters

Exam 6: Descriptive Statistics

"Analysis of analyses" refers to

Exhibit 6-4: Use the data for the following questions.Score 1: 34, 40, 42, 24, 30; Score 2: 40, 38, 41, 49, 42 -Refer to Exhibit 6-4.What percent of the variance of scores in Group 1 is common with the variance of scores in Group 2?

Exhibit 6-5: Indicate your choice of statistics for solving the following questions. -Refer to Exhibit 6-5.We want to see how scores on this examination are related to scores on another examination.

A distribution with many high scores and a few scattered low scores is a ____ distribution:

Under a scattergram, there is a notation that the coefficient of correlation is .06.This means that

Exhibit 6-2: Use the distribution for the following questions.51, 52, 55, 56, 57, 57, 57, 58, 59, 59, 60, 60, 60 -Refer to Exhibit 6-2.The most frequently occurring score is

The denominator of the Smith and Glass effect size is

If every Y-score is exactly one-half its paired X-score, we have ____.

____ would be associated with a scattergram with a moderately wide band of dots going from upper left to lower right.

When we have statistically significant results, what does an effect size tell us?

Compared with stanine scores, z-scores have the advantage of being

Multiplying all raw scores by two will

The sum of the z-scores squared in any distribution is equal to

A negative z score is always

The z-scores for X and Y variables are exactly the same except they have opposite signs.The coefficient of determination is

Why might you prefer to teach a fifth grade class with a mean grade level equivalent of 5.1 and a standard deviation of 1.9 rather than a class with a mean grade level equivalent of 5.1 and a standard deviation of 3.2?

What are the advantages and disadvantages of percentile ranks?

Descriptive statistics are used to:

Which measure of central tendency is best for describing this distribution? 13, 13, 13, 20, 21, 24, 25, 25, 27, 28, 28, 29, 30, 32, 31, 60

The Nature of Scientific Inquiry

The Scientific Approach in Education

he Research Problem

Reviewing the Literature

The Hypothesis

Sampling and Inferential Statistics

Tools of Research

Validity and Reliability

Experimental Research

Experimental Research Design

Ex Post Facto Research

Correlation Research

Survey Research

Defining and Designing Qualitative Research

Types of Qualitative Research

Analyzing and Reporting Qualitative Research

Action Research

Mixed Methods Research

Guidelines for Writing Research Proposals

Interpreting and Reporting Results of Quantitative Research

Filters