X^2 = ∑ (O-E)^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.
For a recent year the following are the numbers that occurred each month in a city. use a .05 significance level to test the claim that homicides in the city are equally likely for each of the 12 months calculate test statistics, x^2 and p value
Month. Number. Month. Number
Jan. 37 July. 48
Feb. 29 August. 50
March. 47 Sept. 50
Apr 39 Oct. 41
May 45 Nov. 36
June. 48 Dec. 36
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