Chapter 2 - Distribution of Scores

Question 1

Distribution
f
p

Answer 1

1. The relative frequency with which values of a variable occur in a sample or population
2. Frequency
3. Proportion

Question 2

Relative frequencies

Answer 2

Represent the proportion of scores in a sample or population having a particular value or falling in a given interval

Question 3

Frequency table for discrete variable

Answer 3

Conveys the number or proportion of scores in a sample or pop having specific values of the variable

Question 4

Cumulative frequency

Answer 4

Number of scores at or below a given value of a variable

Question 5

Cumulative proportion

Answer 5

Proportion of scores at or below a given value of a variable

Question 6

Interval

Answer 6

Range of values of a quantitative variable

Question 7

Score limits of an interval

Answer 7

The min and max whole values of the units of measurement that define the interval

Question 8

Real limits

Answer 8

Min and max real values of scores that define the interval

Question 9

Interval midpoint

Answer 9

Middle value of an interval

Question 10

Subjective probability

Answer 10

Expresses an individual’s subjective judgement about the likelihood that some event will occur

Question 11

Sampling experiment

Answer 11

Random selection of one of the possible values of a variable

Question 12

Proportion of successes

Answer 12

Number of successes divided bu the number of sampling experiments

Question 13

Event

Answer 13

One or more of the possible outcomes of a sampling experiment

Question 14

Probability

Answer 14

Proportion of times the event would occur if the same sampling experiment were repeated infinitely many times

Question 15

Probability distribution

Answer 15

Conveys the probability that a randomly selected score will have a given value or fall in a given interval

Question 16

Probability density function

Answer 16

Plots the density of scores at each value of a continuous variable
d=p/w

Question 17

Rules for grouped frequency table

Answer 17

1. Determine range of scores
2. Determine reasonable number of intervals (5 to 20)
3. Define score limits
4. Arrange intervals highest to lowest
   5.

Question 18

Objective probability

Answer 18

Numerical expression of the likelihood of some event occurring