Question

please only reply if you are available to correct if its wrong, I paid extra money for this question. thank you! NOTE THAT 1.370 IS WRONG

9. 0/1 points | Previous Answers JModd8 4.3.020.CMI My Notes Ask Your Teacher To study the efficiency of its new price-scanning equipment, a local supermarket monitored the amount of time its customers had to wait in line. The frequency distribution in the following table summarizes the findings. Find the standard deviation of the amount of time spent in line. (Round your answer to three decimal places.) 1.370 X min x = Time (minutes) | Number of Customers 79 58 67 45 38 Need Help?Read It Watch Master It 10. + 0.34/1 points | Previous Answers JModd8 4.3.024 My Notes +Ask Your Teacher

Answer 1

f/Ef 0.275 0.202 0.233 0.157 0.132 mid point frequency(f) fM 39.5 87 167.5 157.5 Bin 79 58 67 45 38 287 1-2 2-3 3-4 1.5 2.5 3.5 Total 622.5 Σ1M 2.169 mean- x =- Std deviationM 1.374

from above standard deviation =1.374 ( please try 1.371 if this comes wrong and revert)