Question

find the standardized test statistic z

dom sample of 250 adults from a country. 17.0% say that they are smokers A 0 05, is there havde o port the Amedical researcher says that less than r oads in a certain country we smokersIn a researcher's Complete () tough (e) below (type s of decimals) (b) Find the Chical ) and Identity the con regons) The chical v i eto - 1645 (Round to the decimal places needed Use a comma 1 separatenwers as needed) What are the rejection region Select the corect choice below and in the boxes) to complete your choice (Pound to three decimal places as needed) -1.645 (c) Find the standardized test statistics Round to two decimal places as needed

Answer 1

Aus. O Hypothesis Ho: P= 0.27 Hii p<0.27 0=250 i = 0.176 x=0.05 Test statistic z = P P UPCI-P) = 0.176 - 0.27 0.27 (1-0.27) V 250 = -0.084 0.0280 = -3.3477 -3.35 Z ů 12lcal = 3.35 4.645 i Reject to 2 27 Hypothesis : Ho:P : 0.27 HI:P 7 0.27 D20300 = 87 :x : 82 = 0.29 ñ B 0:29 á Test statistic 2 = à ce 0.29-0.27 0.27C1 -0.27) 000 0.02 0.0256 0.78 2= Rounded to two decimal.