Chp. 6 Probability

Question 1

Probability

Answer 1

In a situation in which several different outcomes are possible, the probability for any specific outcome is defined as a fraction or a proportion of all the possible outcomes. Where possible outcomes are identified as A, B, C, D.

Probability of A = number of outcomes classified as A/total number of possible outcomes

Question 2

Random Sampling

Answer 2

Requires that each individual in the population has an equal chance of being selected.

Question 3

Simple Random Sample

Answer 3

A sample obtained by the random sampling process.

Question 4

Independent Random Sampling

Answer 4

Requires that each individual has an equal chance of being selected and that the probability of being selected stays constant from one selection to the next if more than one individual is selected.

Question 5

Independent Random Sample

Answer 5

Sample obtained from Independent Random Sampling

Question 6

Random Sample

Answer 6

Sample obtained from Independent Random Sampling

Question 7

Sampling with Replacement

Answer 7

In order to keep the probabilities from changing from one selection to the next, each individual is returned to the population before you make the next selection.

Question 8

Sampling without Replacement

Answer 8

Random sampling without the requirement of constant probabilities.

Question 9

Unit Normal Table

Answer 9

A complete listing of z-scores and proportions. The table lists proportions of the normal distribution for a full range of possible z-score values.

Question 10

Percentile Rank

Answer 10

The percentage of the individuals in the distribution who have scores that are less than or equal to the specific score.

Question 11

Percentile

Answer 11

When score is referred to by its percentile rank, the score is called a percentile.