Question

Elementary Statistics.. Find the standardized test statistic

Answer 1

Part C is what I need help with.

Answer 2

I have the answers for p, q and the n1p, n1q, n2p, n2q

Answer 3

Im kinda stuck after that

Answer 4

@dumbcow

Answer 5

The formula is under chapter 8. Its the first one listed

Answer 6

ok so far you should have:
p1 = 0.845
p2 = 0.85

\[P = \frac{397+289}{470+340} = 0.8469\]
Then
\[z = \frac{0.845 - 0.85}{\sqrt{(.8469)(1-.8469)(\frac{1}{470}+\frac{1}{340})}} = -0.195\]

Answer 7

Um where did you get p1 and p2 from? And that cant be right. The answer is -0.21

Answer 8

p1 = 397/470
p2 = 289/340

Answer 9

Ohhh.. Okay I was looking at the wrong formula.. Catching on now

Answer 10

i made the mistake of rounding, thats why im a little off
dont round p1 and p2

Answer 11

Okay. Thank you!