Chapter 5: Quiz

- Questionnaires were distributed to all the households in the town to get people’s opinions about a number of public issues. This process is called
- conducting an opinion poll
- evaluation
- generalizability
__measurement__

- Measurement provides for which of the following?
- obtaining information about the variables being studied
- providing a standard format for recording information
- providing for a quantitative summary of the results from many subjects
__all of the above__

- The type of measurement scale that arranges objects or people from lowest to highest is
- Interval
- Nominal
__Ordinal__- Ratio

- A test score represents which measurement scale?
- Nominal
- Ordinal
__Interval__- Ratio

- The purpose of descriptive statistics is to
__organize and summarize data__- assess students
- measure performance
- evaluate observations

- Which of the following is NOT a characteristic of frequency distributions?
__they enable one to explain isolated scores__- the group data according to the number of times each score occurred
- they indicate whether the distribution is approximately normal or skewed
- the scores and their frequencies are related

- Which of the following is a characteristic of the normal curve?
- it is symmetrical
- it is bell shaped
- the mean, median, and mode are in the middle of the curve
__all of the above__

- A distribution with many high scores and very few low scores can be described as
- Normal
- Positively skewed
__Negatively skewed__- All of the above

- Measures of central tendency provide
- a measure that enables the researcher to study the spread of a distribution.
- A numerical index that summarizes important features about a set of scores.
__A single index that represents the average performance of a group of students.__- Information regarding the variability of a distribution

- Harris is comparing two sets of reading scores for his class. He finds that for Test A the standard deviation is 15, and for Test B it is 6. This means that
- the spread of scores in the two distributions is identical
- the scores for Test B are more variable than Test A scores
__the scores are closer to the mean in Test B than in Test A__- the scores in Test A show low variability

- Approximately what percentage of scores fall between
__+__1standard deviation of the mean?- 33%
- 50%
__68%__- 97%

- We would expect the relationship between height and weight to be
- high and negative
__high and positive__- low and negative
- low and positive

- Which of the following is the strongest relationship?
__-0.81__- -0.14
- +0.37
- +0.78

- An educational measure is said to be valid if
__appropriate inferences are made for the test scores__- it measures something
- test scores are consistent over time
- test scores can be used to make predictions

- Validity is characterized by which of the following?
- it is a unitary concept
- it refers to interpretation of the results
- it is a matter of degree
__all of the above__

- The teacher compare the scores on a reading test that was administered at the beginning of the year with the grades that the students received at the end of the year. Which type of validity evidence is this?
- Content
- Construct
- Reliable
__Predictive__

- When a teacher is concerned with the degree of consistency with which a reading test measures reading ability, she is concerned with test
- Credibility
- Predictability
__Reliability__- Validity

- Which of the following is NOT a source of measurement error attributed to the individual taking a test?
- test anxiety
- motivation
- attitude
__selection of items__

- A research report stated that the sample of 50-students was given two forms of a test. Form A was administered during the first week of the new school year and Form B was administered three weeks later. The reliability coefficient between the two forms of the test was found to be .84. What estimate of reliability was used in this study?
- Equivalence
__Equivalence and stability__- Internal consistency
- Stability

- All of the following are characteristics of the internal consistency estimate of reliability EXCEPT
- reliability coefficient is obtained by dividing a test into equal halves
- It is appropriate for surveys in which subjects respond to items by giving a rating on a particular scale.
__It is appropriate in situations that required a pretest and post-test assess changes in behavior.__- It is used with tests that measure a single trait.

- A study on the stereotypic behavior of a student with severe mental retardation reported an inter-rater reliability of .90. Which method was used to estimate reliability?
__Agreement__- Equivalence
- Internal consistency
- Stability

- Generally speaking the longer the test, the _______ the reliability and the more homogeneous the group taking the test, the ______the reliability.
- higher, higher
__higher, lower__- lower, higher
- lower, lower

- Which of the following statements about the relationship between validity and reliability is true?
- reliability is more important that validity
- a test should be valid but not reliable
- a test should be reliable but not necessarily valid
__reliability is a necessary but not sufficient characteristic for validity__