Overton Chapter 3

21. This is the sum of the total errors made.

Given the following information, determine the raw score. Items attempted: 4, 6, 2, 8, 10; Errors: 1, 2, 1, 2, 3.

Interval

Grade equivalents represent which kind of scale?

z-score

How is the following score being expressed? Score = +2 standard deviations

deciles: Deciles scores are divided into 10 groups, with each group receiving 10% of the scores.

_____ scores are divided into 10 groups, 10 for the lowest group, 100 for the highest.

Stanine: Stanine scores are divided into 9 groups, with 5 being the mean and 2 being the standard deviation.

_____ scores are divided into 9 groups, with 5 being the mean and 2 being the standard deviation.

Normal distribution: A normal distribution hypothetically represents the way test scores would fall if a particular test were given to every single student of the same age or in the same grade in the population for whom the test was designed.

A hypothetical representation of the way test scores would fall if a particular test was given to every single student of the same age or in the same grade in the population for whom the test was designed.

Ratio: Ratio scales are used for direct comparisons and mathematical manipulations; numbers are equidistant from each other.

A person's weight is measured on which kind of scale?

Nominal: Nominal scales are used for identification purposes only; the numbers function like names (e.g., an ID number).

Aggregating students by demographic data such as race/ethnicity and gender relies on which kind of scale?

mean difference

Cognitively, culturally or linguistically diverse groups may have a different mean score than reported for most of the population. When this happens, it is called a _____.

73

Determine the mean of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

76

Determine the median of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

82

Determine the mode of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

34

Determine the range of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

10.83: Standard deviation is found by taking the square root of the variance.

Determine the standard deviation of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

117.2: Variance is found by following these steps. 1) Subtract the mean for the set of data from each score. 2) Square each difference. 3) Find the sum of squares (total of all of the squared score differences). 4) Calculate the average of the sum of squares by dividing the total by the number of scores

Determine the variance of the following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86.

95%

On a normal curve, approximately what percentage of scores is found within 2 standard deviations above and below the mean?

Ordinal

Percentiles represent which kind of scale?

Interval: Interval scales are used for identification that ranks greater or lesser quality or amount; numbers are equidistant. In this case, standard scores are set to be equidistant (i.e., 1 point) and are represented on a continuum that represents lower to higher scores (e.g., 140, 141, 142, etc.)

Standard scores are represented on which kind of scale?

descriptive statistics

Statistics used to organize and describe data are called _____.

norm-referenced tests: Norm-referenced tests are designed to compare a student to national averages represented by the norm group.

Tests designed to compare an individual student's scores with national averages are called ___.

Negatively skewed distribution

The following distribution of test scores: 52, 56, 68, 72, 74, 78, 80, 82, 82, 86 would produce what type of distribution?

Variance

This measure describes how spread out the scores in a distribution are from the mean.

Standard deviation

This measure helps determine how much distance from the mean is typical and how much is considered significant.

Norm-referenced: Norm-referenced scores are determined when a national sample of students of the same age/grade attempts the same items on an assessment.

What type of score is determined when a national sample of students of the same age or grade attempts the same items on an assessment?

Raw score

Which of the following is NOT a derived score?