Use proportion of Americans with no landline is 042 In a sam

Use proportion of Americans with no landline is 0.42. In a sample of 50 people, 18 had no landline. Does this provide sufficient evidence to conclude that the proportion of Americans without landlines has decreased?

H0:P=P0

H1:P<P0

Z=P-P0/sqrt(P0Q0)/n

P0=0.42

P=18/50

n=50

since p is greater than 0.05, we accept H0.

Observed	Hypothesized
0.36	0.42	p (as decimal)
18/50	21/50	p (as fraction)
18.	21.	X
50	50	n

	0.0698	std. error
	-0.86	z
	.1950	p-value (one-tailed, lower)

Use proportion of Americans with no landline is 0.42. In a sample of 50 people, 18 had no landline. Does this provide sufficient evidence to conclude that the p

Use proportion of Americans with no landline is 042 In a sam

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