SOLUTION: Statistics: A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 301 people over the age of​ 55, 66 dream in blac

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Question 1009764: Statistics: A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 301 people over the age of​ 55, 66 dream in black and​ white, and among 294 people under the age of​ 25, 13 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25
How to find z score for two samples?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
This is a two sample proportion test
Ho=the two are equal or under 25 is more
Ha=over 55 is more
alpha=0.05
one-tail z-test
critical value z>1.645
z=(pO-pY)/sqrt {(p1*(1-p1)/n1 +(p2)*(1-p2)/n2}
pO=0.219
pY=0.0442
z=6.29
This is highly significant with p<0.0001
The null hypothesis is rejected.