For a sample of data, I got that the mean = 4.31 and the median = 4.42. Also, 36% of the values from the sample are less than the mean. Does this illustrate that the data is skewed left?
Here is a histogram illustrating your data.
As you surmised from the summary statistics, this data distribution is left skewed and most of that skewness is caused by the four observations between $3.4$ and $3.5$. Whether they or any others are faulty observations or not is for you to decide, but you should be reluctant to exclude them from the analysis without good reason.