points Save Answer QUESTION 4 An online computer store conducted a survey to its

Question

points Save Answer QUESTION 4 An online computer store conducted a survey to its members whether they were planning to purchase a computer within a year. One year later, the survey respondents' purchase records were reviewed whether they purchased a computer or purchased some computer parts. The results of these surveys were summarized as the following frequency distribution table: Purchased a computer Purchased parts Did nothing Planned to purchase 60 100 240 90 180 330 Not planned Based on the data, answer these questions: Is the event of "planning to purchase a new computer statistically independent of the event of "purchasing a computer ? Is the event of planning to purchase a new computer" statistically independent of the event of "purchasing parts"? is independent of purchasing parts", but NOT independent of-purchasing a computer a planning to purchase a computer b. 'Planning to purchase a computer is independent of both O c."Planning to purchase a computer" is NOT independent of both. to purchase a computer" is independent of "purchasing a computer, but NOT independent of "purchasing parts

Explanation / Answer

Answers is (a)

Planning to Purchase a computer is independent of Purchasing parts but NOT independent of purchasing a computer.

Explanation:

Inpendent event - both events are non-relavent (or) the actions are nothing to do with each other

Example

In the present case, Planning to purchase a computer is nothing to do with purchasing parts (they are different parts), so it is INDEPENDENT.

dependent events - both are well correlated (directly related) events or the actions

Example:  

In the present case, Planned to purchase a computer is directly related to purchasing a computer, so it is NOT INDEPENDENT (DEPENDENT)

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