neighborhood of 40 households records the following distribution, based on the number of pets per household: # of pets/ household Frequency 0 6 1 18 2 12 3 3 4 1 a) Construct a relative frequency distribution and a cumulative frequency distribution. b) Which of the 3 distributions above (original, relative, and cumulative) can be used as a probability distribution. What conditions qualify it as a probability distribution? c) If a household is randomly selected, what is the probability of selecting a household with 2 or more pets? d) What is the mean number of pets per household in this neighborhood?

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