import statistics

pressure_arr = [80, 90, 100, 150, 120, 110, 160, 110, 100]
mean = statistics.mean(pressure_arr)
print ("The mean value of pressure_arr is ", mean)
#get this formula from :https://appdividend.com/2019/01/28/python-statistics-tutorial-mean-function-example/

import statistics

pressure_arr = [80, 90, 100, 150, 120, 110, 160, 110, 100]
mean = statistics.mean(pressure_arr)
print ("The mean value of pressure_arr is ", mean)
#get this formula from :https://appdividend.com/2019/01/28/python-statistics-tutorial-mean-function-example/

#get this formula from :https://appdividend.com/2019/01/28/python-statistics-tutorial-mean-function-example/