# Assume the population is 5 n x s a 38 38 38 a h h µ

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Assume the population is normal 16, 35, 5. n X s = = = (a) 0 0 : 38 , : 38 ( 38). a H H µ µ µ = < = 0 0 15,.05 0 35 38 2.4. 2.4 1.753. / 5/ 16 We can reject at .05. X t t s n H µ α = = ≈ − < − = − = (b) 15,0.025 15,0.01 2.131 2.4 2.602 t t = < < = 0.01 value 0.025 p < < (c) 95% C. I is 15, 0.025 15, 0.025 , (32.336, 37.664). s s X t X t n n + = Pepsi 17 16 19 20 18 Shasta 22 20 18 19 21 Subject 1 2 3 4 5 Before 150 195 188 197 204 After 143 190 185 101 200 Answers Answers p-value 0 - 0 N(0,1) p-value 0 0 t -2.4
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