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question:Write a python function to create a dictionary where the keys are words from a given sentence and the values are the number of occurrences of each word.

answer:def word_count(sentence): Returns a dictionary that contains the words as keys and their number of occurrences as values. Parameters: sentence (str): A sentence which may contain multiple words. Returns: dict: A dictionary with words as keys and their occurrences as values. words = sentence.split() word_frequency = {} for word in words: word = word.lower() # To count words in a case-insensitive manner if word in word_frequency: word_frequency[word] += 1 else: word_frequency[word] = 1 return word_frequency

question:Write a python function to calculate the Mean Absolute Deviation (MAD) of a list of numbers. The function should take a list of numbers as its input and return the MAD of those numbers. The MAD is calculated as the average of the absolute differences between each number and the mean of the list.

answer:def mean_absolute_deviation(numbers): Calculates the Mean Absolute Deviation (MAD) of a list of numbers. Parameters: numbers (list of float): A list of numbers. Returns: float: The Mean Absolute Deviation. if not numbers: return 0 mean = sum(numbers) / len(numbers) deviations = [abs(x - mean) for x in numbers] mad = sum(deviations) / len(deviations) return mad

question:Write a python function to check if an integer (signed or unsigned) is a power of 3.

answer:def is_power_of_three(n): Checks whether the given integer `n` is a power of 3. :param n: The integer to check. :return: True if `n` is a power of 3, otherwise False. if n <= 0: return False while n % 3 == 0: n /= 3 return n == 1

question:Write a python function to find the second largest number in a list using programming.

answer:def second_largest(numbers): Returns the second largest number in the list. Assumes the list has at least two distinct numbers. first = second = float('-inf') for number in numbers: if number > first: first, second = number, first elif number > second and number != first: second = number if second == float('-inf'): raise ValueError("List does not contain enough distinct numbers") return second