Sleep apnoea is a sleep disorder that causes a person to stop breathing momentarily and then awaken briefly. A study of 687 Victorian commercial truck drivers found that 65 of them suffered from sleep apnoea. Use the survey results to estimate, with 90% confidence, the proportion of Victorian commercial truck drivers who suffer from this sleeping disorder. Report the lower bound of the interval only, giving your answer as a percentage to two decimal places.

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We can use a confidence interval to estimate the proportion of ... View the full answer