In the general population, political party affiliation is 30% Republican, 55% Democrat, and 15% Other. To determine whether these percentages also “fit” the elderly population, we ask a sample of 100 senior citizens and find 26 Republicans, 66 Democrats, and 8 Other. Compute X2obt.  What is χ2crit? What do you conclude about party affiliation among senior citizens?

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.