What is the Null hypothesis, alternative hypothesis, rejection criteria(what is the value of s at which you will reject the null hypothesis),

Question

Rejection criteria: what is the p-value at which you will reject the null hypothesis?

test statistic: z value?

test statistic p value?

decision regarding the null hypothesis?

conclusion?

is this result practically significant, list two confounding variables?

A five year study of senior citizens compared to those who consumed sushi versus those who did not. It found that 267 out of 4529 candy consumers died from stomach cancer compared to 247 out of 3312 non-consumers.

conduct a significant tests at the 5% level of significance to determine if there is a significant difference in cancer rates of consumers versus non-consumers.

Answer 1

phat1 = 267/4529

phat2 = 247/3312

phat = (267 + 247)/(4529 + 3312)

z-calc = (phat1 - phat2)/sqrt(phat(1-phat)(1/4529 + 1/3312))

p-value - P(|z| > z_calc)

reject null hypothesis is p-value < 0.05

confounding variable is candy consumption