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Experimental research methods and statistics > WEEK 6 > Flashcards

WEEK 6 Flashcards

1
Q

What are descriptive statistics?

A

Statistics that describe the data’

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2
Q

What types of statistics are descriptive statistics?

A

-Mean
Median
Mode
Standard deviation

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3
Q

What are inferential statistics?

A

Statistics tests that make inferences about data

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4
Q

What is distribution?

A

A distribution of data is basically a representation of data as a whole

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5
Q

What is the bell curve?

A

The shape of normal distribution

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6
Q

In a normal distribution, what happens to the averages?

A

Mean, mode, median are the same

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7
Q

What 2 things can happen to a curve of data?

A
  • Become skewed

- Become kurtosis

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8
Q

What How does distribution become skewed?

A

When data is not symmetrical around the mean

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9
Q

If fhe data is skewed, what does the data have to be?

A

above 1 or -1

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10
Q

What is kurtosis?

A

Describes the pointyness of the distribution

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11
Q

What is platykurtic?

A

When distribution is flat or short

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12
Q

What is leptokurtic?

A

When distribution is tall and thin

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13
Q

What is a test statistic?

A

A statistic that summarises the data

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14
Q

How do we obtain test statistics?

A

Through inferential stats

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15
Q

What are common test stats?

A

F and T tests

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16
Q

What is null hypothesis statistical testing?

A

Statistical tests done to see whether which hypothesis we should reject and accept

17
Q

What approaches are NHST based on?

A
  • Fisher’s work- use of pfobability to test null hypothesis

- Reyman and Pearson- testing a null hypothesis against an alternative hypothesis

18
Q

What are different ways to express probability?

A

Percentage
decimal
fraction
Usually done between 0 to 1

19
Q

What is probability distribution?

A

The probability is represented through graphs to show the distribution of data

20
Q

What is alpha level’?

A

The rule in psychology that probability is less than 5%

P< 0.005

21
Q

When is data statistically significant?

A

When the probability is less than the alpha level

Experimental research methods and statistics (6 decks)

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