Yes there can be more then one outlier
Yes.
Yes, any data point outside thestandard deviation its an outlier
the mode is 8 more than the outlier.
Then you treat the other one(s) as you would have done if there was only one.
i can not tell you need to space it out and to find outlier try using a box and whisker plot. and if it is just one number there is no outlier
An outlier does affect the mean of the data. How it's affected depends on how many data points there are, how far from the data the outlier is, whether it is greater than the mean (increases mean) or less than the mean (decreases the mean).
An outlier.
An outlier can be very large or small. its usally 1.5 times the mean. they can be seen with a cat and whisker box * * * * * The answer to the question is YES. "Its usually 1.5 times the mean" is utter rubbish - apart from the typo. If a distribution had a mean of zero, such as the standard Normal distribution, then almost every observation would be greater than 1.5 times the mean = 0 and so almost every observation would be an outlier! No. There is no universally agreed definition for an outlier but one contender is values that are more than 1.5 times the interquartile range away from the median.
No, median is not an outlier.
The one that does not belong
0s are not the outlier values