The heights of men in a particular district are distributed with mean u cm and the standard deviation ocm. On the basis of the results obtained from a random sample of 100 men from the district, the 90% confidence interval for us was calculated and found to be 177.22cm to 179.18cm. If the sample mean I was calculated to be 178.2cm, find the value of the population standard deviation o. (Round your final answer to 1 decimal place) Click here to access Z tables, T tables, Chi-squared tables or Formula Sheet