Casio FX-8700G Manuel du propriétaire télécharger pdf (Page 54)

2 Find the median of the test scores listed below on a TI calculator.

82 91 74 78 94 68 74 88 64 42

72 82 79 99 98 75 61 78 86 69

Only the Casio fx-7700GE and the TI-82/83 graphing calculators will

compute the median of a set of data for you. However, the TI-81 calculator

will sort data from least to greatest according to the x- or y-values so that

the median can be found easily.

Clear the data memory and enter the data into your calculator.

Casio fx-7700GE:

™ £ ¡

Clear the data memory.

and so on 69

Chooses the standard deviation function menu.

¢ ™ e

Chooses the median from the

representative menu and calculates.

TI-81:

‹_ª

Clear the data memory.

‹_ª

é é

Choose the data edit option

and so on 69

and enter the data.

TI-82/83:

‹Lé

Clear data list L1.

_é

Choose the data edit option

and so on 69

and enter the data.

TI-81: Now sort the data using the xSort option under the statistics data menu.

‹_ª

We have 20 pieces of data, so the median is the average of the 10th

and 11th values. We can use the

≈

key, located above the 0 key,

to recall the x-value of a data point when we enter the number of

the data point in the set. This will allow us to find the mean of the

10th and 11th values.

(‹≈

)+‹≈

))/

TI-82/83: Find the single variable statistics.

_¶éé

Use the down arrow key to scroll down to read the median

value which is listed as Med  .

The median test score is 78.

Note: On the TI-81, the

y-values must all be 1 for

this technique to be

accurate.

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 87 88

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Casio FX-8700G Manuel du propriétaire Page 54

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