aore ·n, carcurate X, and draw appropria e conclusions II. CALCULATION OF CHI-SQ

Question

aore ·n, carcurate X, and draw appropria e conclusions II. CALCULATION OF CHI-SQUARE USING A CALCULATOR You will increase both the speed and the accuracy with which you calculate x if you use an inex pensive hand-held calculator for that purpose. A hand calculator suitable for the purposes of this in- vestigation can be purchased for $10 or less. TABLE 3.7. Calculation of on Data from Investigation 2 (Table 2.1) Results (o - E (0-E),E Heads Tails Totals 24 Deyrees of freedom P range: I accept/reject the hypothesis that the data approximate the expected ratio of 1:1

Explanation / Answer

Ans:

Chi suqare=0.667

degree of freedom=2-1=1

p-value=CHIDIST(0.667,1)=0.4142

I accept the hypothesis that the data approximate the ratio 1:1

O E O-E (O-E)^2 (O-E)^2/E Heads 14 12 2 4 0.333 Tails 10 12 -2 4 0.333 Total= 24 24 0.667

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