What conditions would make our 95% confidence interval for a mean invalid? Non-random sample Approximately Gaussian distribution Accurate data Independent observations Question 10 The confidence interval for a mean gives how close the sample mean is to the sample median the range of values of 95% of the data how precisely you think you know the populationhnean Question 11 What is an appropriate interpretation of an error bar? () The error bar indicates the value of the true mean. The true value is within one error bar range. The true value is likely within the range of error bars