[Python] How to calculate the mean and SD from multiple lists in a dictionary and sort them...

I have a dictionary containing 5 keys, each key has 10 values assigned to it in the form of a list:

{'a': [5, 6, 3, 1, 3, 2, 5, 8, 6, 7],
'b': [3, 5, 2, 7, 0, 2, 10, 4, 3, 4],
'c': [9, 7, 11, 10, 8, 9, 7, 10, 7, 9],
'd': [6, 4, 5, 7, 6, 8, 5, 6, 5, 7],
'e': [2, 5, 1, 4, 2, 3, 4, 2, 5, 1]}


I also have an empty dictionary that I have set up that I want to store the mean and standard deviation for each list in the original dictionary:

{'a_analysis': [],
'b_analysis': [],
'c_analysis': [],
'd_analysis': [],
'e_analysis': []}


I have this code so far:

for key in original_dictionary: #for each key in the dictionary
for value in original_dictionary: #iterate through the values in each key
sum =+ value #add the value to a sum variable
mean = sum / len(orignal_dictionary[key]) #get the mean by dividing the sum by the len of each key
#here I want to return the mean value to the respective key in the new dictionary
sd = #then I need to get a value for the standard deviation here
#and also return it to the respective key in the new dictionary


Any help would be greatly appreciated.

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