Question

CWUIN. IY 1 Score oft Section 14.1 Exercise 1 HW Score: SON, 2 of 4 pts Question

Answer 1

the necessary calculation table is :-

birth time	observed	expected	$\frac{(obs-exp)^2}{exp}$
winter	25	120/4 = 30	(25-30)2/30 = 0.83333
spring	37	120/4 = 30	1.63333
summer	31	120/4 = 30	0.03333
fall	27	120/4 = 30	0.3
total	120		2.79999

a).expected number of birth in each season is = 30

b).the chi square statistic is ;-

$\chi^2=\sum\frac{(obs-exp)^2}{exp}=2.79999 = \mathbf{2.80}$

c).the degrees of freedom is = (4-1 )= 3

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