maths
posted by Khyati
In 2010 a sample of 50 cars was taken, yielding 8 small cars, 27 medium cars and 15 large cars. A sample of 50 cars taken in 2015 revealed 10 small cars, 25 medium cars and 15 large cars. Calculate the chisquared test statistic here.

PsyDAG
Use the Chisquare (X^2) method.
X^2 = ∑ (OE)^2/E, where O = observed frequency and E = expected frequency.
∑ = sum of all the cells.
E = (column total * row total)/grand total
df = n  1, where n = number of cells
Look up value in X^2 table in the back of your textbook.
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