Question

we want to build a 95% confidence interval for the average height of the Swedes. 48 Swedes are surveyed. The average of the sample is 71 inches. The standard deviation of the sample is 2.8 inches. identifies the arithmetic mean

Answer 1

Confidence interval for population mean is given by :

  

where  

Here ,

So,  

So,

= {71.7921 , 71.2079 }