4.3 Practice Problems 1. A study is conducted to estimate

4.3 Practice Problems 1. A study is conducted to estimate the mean total cholesterol level in children 2-6 years of age. A sample of 9 participants is selected and their total cholesterol levels are measured as follows. 185 225 240 196 175 180 194 147 223 a. Use the...

Statistics Analytical Problems

a. Many travellers arrange their travel plans over the internet. A recent survey of 1000 randomly selected respondents reported that 55% purchased plane tickets over the internet. i. Find the 99% confidence interval estimate of the population proportion of travellers...