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BMSc > Statistics > Flashcards

Statistics Flashcards

1
Q

Definition of mean?

A

How data is concentrated. I.e. The avaerage

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2
Q

Definition of standard deviation?

A

How data is separated. I.e. The average distance away from the mean

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3
Q

What is frequency?

A

How many times the sample value occurs

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4
Q

What is distribution?

A

Shows all possible values and how often they occur

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5
Q

Large sample size of variables with natural charactreistic will show…

A

…normal distribution

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6
Q

What shame does natural distribution take on a graph?

A

Bell curve

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7
Q

What value is at the peak of the normal distribution curve?

A

Mean

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8
Q

In normal distribution how much data will be included within +/- 1SD?

A

68%

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9
Q

In normal distribution how much data will be included within +/- 2SD?

A

95%

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10
Q

In normal distribution how much data will be included within +/- 3SD?

A

99%

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11
Q

What files can be imported into SPSS?

A

TXT, Excel, manually imported data

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12
Q

What are the three main data types?

A

Numerical, nominal and ordinal

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13
Q

What can be shown in a histogram?

A

Frequency and distribution

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14
Q

What can users of SPSS do with the Variable View interface?

A

Define the variable, name the data, create data table

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15
Q

What can users of SPSS do with the Data View interface?

A

Import data and edit data

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16
Q

Define median

A

The middle value when data rearranged from lowest to highest. If odd number of samples- middle sample directly If even number of samples- the mean of the middle two samples

17
Q

What is the difference between mean and median?

A

Mean is not a sample directly wheras median. Median can be a sample directly (or mean of two middle samples)

18
Q

What is the meaning of minimum and maximum in terms of sample data?

A

The lowest and the highest data samples respectively

BMSc (2 decks)

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