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Abi Mathematics 2015 > Data Handling > Flashcards

Data Handling Flashcards

1
Q

What is measurement data?

A

Measurement data is data obtained by measuring with some form of instrument.

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2
Q

What are examples of counting data?

A

People, fish, objects, shoes…

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3
Q

What are examples of measurement data?

A

Height, rainfall, length, weight, waist, distance…

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4
Q

What is discrete data?

A

Counting data.

Natural numbers.

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5
Q

What is continuous data?

A

Measurement data.

Rational numbers: decimals & fractions

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6
Q

What is counting data?

A

Counting data is the data obtained by counting how many of a particular type of object there is.

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7
Q

What is quantitative data?

A

Data that has quantity, i.e. an amount.

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7
Q

What is ranked data?

A

It is data that has been sorted from the lowest value to the highest value, i.e. ascending order.

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8
Q

What are measures of central tendency?

A

They are values around which the data falls.

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9
Q

What is an average?

A

An average is a number that describes (or typifies) a data set.

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11
Q

What is the symbol for mean?

A

An x bar

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12
Q

What is the symbol for median?

A

A capital M, or the second quartile.

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13
Q

What is the symbol for mode?

A

The is no symbol.

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14
Q

What is the mean?

A

The mean is when you add all the values together, and divide them by the number of values.

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15
Q

What is the median?

A

It is the number which is halfway through an ordered set of data.

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16
Q

What is the mode?

A

It is the value that appears the most in a data set.

17
Q

What is range?

A

It is the maximum value minus the minimum value.

18
Q

What are the three averages used for data handling?

A

Mean, median and mode.

19
Q

What kind of data is used in histograms?

A

Measurement (continuous data)

20
Q

What is a histogram?

A 
A histogram contains continuous data, and THE BARS MUST TOUCH.
The widths of class intervals must always be the same.
21
Q

What is a class interval?

A

It is a way of classifying large amounts of data.

22
Q

What is the formula for mean?

A

Σx

n

23
Q

What does the formula for mean mean?

A 
xbar=Σx 
           n
xbar~mean
Σ~sum of
X~all data
n~number of data products

Abi Mathematics 2015 (25 decks)

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