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Psychological Statistics > Long Exam 3 > Flashcards

Long Exam 3 Flashcards

1
Q

entire set of individuals who share at least one characteristic

A

population

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2
Q

sampling that is based on what is readily available to the researcher

A

convenience sampling

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3
Q

what is quota sampling?

A

diverse characteristics of a population are sampled in the proportions that they occupy in the population

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4
Q

what type of sampling uses logic, common sense, and sound judgment to gather participants?

A

purposive sampling

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5
Q

every member of the population has the same chance of being included in the sample

A

random sampling

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6
Q

how can we reduce sampling error?

A

increase the sample size
be sure that the sample was representative of the population

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7
Q

The sampling distribution of means approximates a ______ ______

A

Normal Curve

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8
Q

True or False: The standard deviation of a sampling distribution of means is greater than the standard deviation of the population.

A

False

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9
Q

True or False: Mean of SDM = True population mean

A

True

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10
Q

range of values where our true population might be at a certain degree of confidence

A

confidence interval

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11
Q

A smaller sample size will have a ______ confidence interval

A

narrow

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12
Q

quality that distinguishes one group from another

A

Independent Variable

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13
Q

the variable that is being measured

A

dependent variable

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14
Q

The _________ is the degree where the null hypothesis can be rejected with confidence and is denoted by a.

A

level of significance

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15
Q

What is the range of values where our true population might be at a certain degree of confidence?

A

Confidence Interval

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16
Q

Which type of T-test consists of completely randomized and unpaired samples?

A

Independent Sampling T-test

17
Q

True or False: The relationship between the likelihood of a Type 1 Error and the likelihood of a Type 2 Error is directly proportional.

A

False. It is inversely proportional. You cannot reduce both errors at the same time.

18
Q

What is the reason for being unable to reject the null hypothesis?

A

Lack of contradictory evidence

19
Q

If the null hypothesis is retained, any observed difference is attributed to __________

A

sampling error

20
Q

What is the frequency distribution of a large number of differences from randomly drawn sample means?

A

Sampling Distribution of Differences Between Means

21
Q

If tobt > tcrit , what is the outcome of the study?

A

Reject the null hypothesis. There is a significant difference.

Psychological Statistics (1 decks)

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