Suppose that you want to estimate the relationship between​ people's weight ​(W​) and the number of times they eat out in a month ​(EO​): ​,
where is the intercept of the population regression​ line; is the slope of the population regression​ line; is the error​ term; and the subscript i runs over​ observations, i​1, ...​ , n.
For​ this, you collect data from a random sample of people 250. After analyzing the​ data, you determine that the covariance between​ people's weight and the number of times they eat out in a month is 4.85 and the variance of the number of times people eat out in a month is 3.59. You also find that the mean weight of people in the sample is 62.36 kg and the mean number of times people eat out in a month is 2.46 .
The OLS estimator of the slope is