Medical tests were conducted to learn about drug-resistant tuberculosis. of 142 cases tested in new jersey, 9 were found to be d
rug-resistant. of 268 cases tested in texas, 5 were found to be drug-resistant. do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the two states? use a.02 level of significance. hint: make sure that you carry 4 decimals for your intermediate workings.
Phat1 = 9/142 Phat 2 = 5/268 Phat 3 14/410 Test statistics = (Phat 1 - Phat 2) / (Square root of (phat × (1- phat)) times the square root of (1/n1 + 1/n2)) Test statistics = 2.373 P- value = 2× (1- normal cdf (2.373, 0, 1)) = 0.0176 At the level of significance, there is difference between the proportion of drug-resistant wihtin the two states.
In homeostasis the body has a target set point which it tries to maintain, with the use of the negative feedback loop the body strives to stabilize the internal environment by regulating the temperature of the body.
