We are using python, and this is not allowed numpy and panda

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Problem 3. What is the mean and standard deviation of the education levels? Compute a pair (mu, sigma) containing the mean (mu) and standard deviation (sigma) of the "PercentCollegeGrad" attribute over all counties. You are not allowed to use library functions for mean and standard deviation. You must compute them yourself using the following definitions (N number of tuples) (z,-)2, where 81570 122 5454454454 2 644 663533 2508592962 89337163 305151 215868 03732722 33073 660116 a642993259 201825 231 017920619 2 733584295 591767 696476 4 4 3 2 3 0 7 3 8 9 5 4 5 6 7 500384 611113 C489396936199 054 5 19199141 126 688 661 929 599 76238 222122122222111211221 2 989193267925418194489 24638557070148341115- 59553 058 3 7875 33131 296 1760 4108767846 9767 t251514 1 2411 nGne- aPa enld sk lo es Pkk nna Bhn anehh ueeo 0123456789012 12345073