Chapter 6

Question 1

Probability

Answer 1

For any specific outcome is defined as a fraction or a proportion of all the 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 this process is called simple random sample.

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

A sample obtained with independent random sampling technique.

Question 6

Random sample

Answer 6

Same as independent random sample but simply called random sample.

Question 7

Sampling with replacement

Answer 7

To keep probabilities from changing from one selection to the next, it is necessary to return each individual to the population before you make the next selection.

Question 8

Sampling without replacement

Answer 8

In particular, it is very common to define random sampling without the requirement of constant probabilities that is, random sampling without replacement.

Question 9

Unit normal table

Answer 9

Z scores and proportions is provided and this table lists proportions of the normal distribution for a full range of possible z score value.

Question 10

Percentile Rank

Answer 10

For a specific score is defined as 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 a score is referred to by its percentile rank, the score is percentile.