# Thread: Probability of opposite of mean

1. ## Probability of opposite of mean

I am trying to calculate the probability of reverse preferences for an outcome. I have the mean and standard deviation of the predicted outcome, how can I calculate the probability of the reverse? Thanks!

2. ## Re: Probability of opposite of mean

Could you elaborate a little bit more?

3. ## Re: Probability of opposite of mean

Agreed, I have no idea what you want to do. If I had to guess, you have a probability for an event and now you want the probability of non-event. But that seems off.

4. ## Re: Probability of opposite of mean

I'm sorry, that was a terrible explanation. I have completed a study using a random parameters logit model for preferences for an environmental good. I have the mean coefficient for preferences for a certain attribute of this good. As normal distributions imply that some people will have preferences with the opposite sign to the mean, I would like to work out the probability of this. E.g: mean coeff for more wind turbines= -0.123 (people have neg preferences for more), what is the probability that people will have positive preferences for more turbines? I think I can use the mean and standard deviation of the distribution but I'm not sure how.

5. ## Re: Probability of opposite of mean

Is that variable significant in your logistic reg model and how was it formatted?

6. ## Re: Probability of opposite of mean

The variable is significant at 1% level. I have used a choice set with different levels of turbines but the variable is set up as a continuous variable, so the result is for each additional turbine. I have other variables to establish also but these are dummies. These are also significant at 1% level.

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