Question

Two populations are considered: cell phone users and nonusers. n1 = 98 cell phone users and n2=102 non-users are randomly selected and checked for brain cancer. Is the proportion of brain cancer different in these 2 populations? Perform the Z test for comparison of proportions (Normal Theory method) to test

H_o: p_{bc cell-user} =p_{bc non-cell-user}i.e. H_o: p₁=p₂

H_a: p_{bc cell-user} ≠ p_{bc non-cell-user} H_a: p₁ ≠ p₂

	Cell-users	Non-users	Total
Brain cancer	18	7
No brain cancer	80	95
Total	98	102

Find the standard error of the difference in sample proportions assuming the null hypothesis is true.

	a.	The correct answer does not appear as one of the choices.
	b.	.0234
	c.	.1296
	d.	.0159
	e.	.0468

Answer 1

from above option E is correct