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14 September, 13:42

A group of statisticians at a local college has asked you to create a set of functions that compute the median and mode of a set of numbers, as defined in Section 5.4. Define these functions in a module named stats. py. Also include a function named mean, which computes the average of a set of numbers. Each function should expect a list of numbers as an argument and return a single number. Each function should return 0 if the list is empty. Include a main function that tests the three statistical functions with a given list.

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  1. 14 September, 15:29
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    see explaination

    Explanation:

    #Function receive list as a parameter & returns single value

    def median (list):

    #Checking for empty list

    if len (list) = = 0:

    return 0

    list. sort () #Arranging list of elements

    midIndex = int (len (list) / 2) #Determining middle element

    if len (list) % 2 = = 1:

    #return median when number of elements in list is odd

    return list[midIndex]

    else:

    #return median when number of elements in list is even

    return (list[midIndex] + list[midIndex - 1]) / 2

    #This function will calculate the mean of given list of numbers

    #Function receive list as a parameter & returns single value

    def mean (list):

    #Checking for empty list

    if len (list) = = 0:

    return 0

    total = 0

    for number in list:

    total + = number

    return total / len (list) #returns calculated mean

    #This function will calculate the mode of given list of numbers

    #Function receive list as a parameter & returns single value

    def mode (list):

    if len (list) = = 0:

    return 0

    numberDictionary = {} #Creating dictionary

    for digit in list:

    number = numberDictionary. get (digit, None)

    if number = = None:

    numberDictionary[digit] = 1

    else:

    numberDictionary[digit] = number + 1

    #Getting the maximum value from list

    maxValue = max (numberDictionary. values ())

    modeList = []

    for key in numberDictionary:

    #Determing elements which has the maximum value

    if numberDictionary[key] = = maxValue:

    modeList. append (key) #adding elements into list whose value is maximum

    return modeList #returns mode list

    def main ():

    #Creating list

    list = [3, 1, 7, 1, 4, 4, 10]

    print ("List:", list) #Printing list of elements

    #Printing mode of given list by calling function & passed list as a parameter

    print ("Mode: ", mode (list))

    #Printing median of given list by calling function & passed list as a parameter

    print ("Median : ", median (list))

    #Printing mean of given list by calling function & passed list as a parameter

    print ("Mean: ", mean (list))

    main ()
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