Question

xbar []:

s []:

TS [is between -1.85 and -1.70; show your work getting it]:

Please help me to find the above values: bar, s, and TS using the information below

Sample of 494 patients. 25 patients classified in the IFG stage.  An article cites population estimates for IFG among all patients in that area as 7.1 percent.  Is there sufficient evidence to indicate that our sample comes from a population with a prevalence of IFG different from 7.1 percent?  Use level of significance of 0.01

Answer 1

Let p denotes the true proportion of patients with a prevalence of IFG.