Question 6 options 1 21448 the degrees of freedom is 4 and t

Question 6 options:

	1) 21.448, the degrees of freedom is 4, and the p-value is 0.9828.
	2) 12.02, the degrees of freedom is 4, and the p-value is 0.0100.
	3) 12.02, the degrees of freedom is 4, and the p-value is 0.0172.
	4) None of the other options are fully correct.
	5) 12.02, the degrees of freedom is 9, and the p-value is 0.2122.

Solution

3 is the answer

	Windows	Apple	Linux
Blackberry	21	51	29	101
iPhone	26	41	9	76
Android	23	24	16	63
	70	116	54	240
Expected frequencies
	(70*101)/240=29.458	48.817	22.725
	22.167	36.733	17.100
	18.375	30.450	14.175
				240
(Oi-Ei)^2/Ei
	2.429	0.098	1.733
	0.663	0.496	3.837
	1.164	1.366	0.235
				12.020
pvalue	0.017206