Statistics and Standard Deviation question?
During a rock concert, the noise level (in decibels) in front row seats has a mean of 95 dB with a standard deviation of 5 dB. Without assuming a normal distribution, find the minimum percentage of noise level readings within 4 standard deviations of the mean. Please help. Any insight would be greatly appreciated. I've been stuck on this problem for the last 2 hours. Thank you :)