Jose spins the spinner 500 times. In those 500 spins, the arrow lands on 3 a total of 42 times. Based on this information, should Jose be concerned that the spinner is unfair? Explain.
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Question

Jose spins the spinner 500 times. In those 500 spins, the arrow lands on 3 a total of 42 times. Based on this information, should Jose be concerned that the spinner is unfair? Explain.
http://assets.openstudy.com/updates/attachments/54ff29cae4b0a485345e94fb-garcia101-1426010185408-ma.png

daniellelovee · Answer

@Directrix

daniellelovee · Answer

0.25*500=125
The spinner is not unfair, and 125-42=83 difference.

daniellelovee · Answer

thats what I have so far

directrix · Answer

This is experimental probability, not theoretical probability.

In theory, we expect 125 times that the arrow lands on "3."

Reality may yield different results.

In my opinion, Jose needs more spins to determine whether to assess that the spinner is unfair. 

There is rarely certainty in probability.

I don't conclude that the spinner is unfair based on 500 spins with 42 "hits" on "3."

daniellelovee · Answer

alright thank you can I keep asking you questions ?

directrix · Answer

Post in a new thread.

daniellelovee · Answer

alright thank you so much for always helping me

directrix · Answer

You are welcome.