HP 12C Financial Programmable Calculator User Manual download pdf (Page 111)

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4. Key in the respective frequency and press . The display shows the

number of data points entered.

5. Repeat steps 3 and 4 for each data point.

6. To calculate the mean, press 05 .

7. Press to find the standard deviation.

8. Press to find the standard error of the mean.

9. For a new case, go to step 2.

Chi-Square Statistics

The chi-square statistic is a measure of the goodness of fit between two

sets of frequencies. It is used to test whether a set of observed

frequencies differs from a set of expected frequencies sufficiently to reject

the hypothesis under which the expected frequencies were obtained.

In other words, you are testing whether discrepancies between the

observed frequencies (O

) and the expected frequencies (E

) are

significant, or whether they may reasonable be attributed to chance. The

formula generally used is:

Keystrokes Display

CLEAR

190

1.00 First data pair.

195

2.00 Second data pair.

200

3.00 Third data pair.

206

4.00 Total number of data sets.

199.44 Average monthly rent (maen).

5.97 Standard deviation.

0.37 Standard error of the mean.

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 164 165

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HP 12C Financial Programmable Calculator User Manual Page 111