Question

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Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these scores is 74. Does this set have an outlier and, if so, how does removing it impact the mean?

1.This data set has no outliers.

2. The set has 30 as an outlier and removing it decreases the mean by about 5.

3. The set has 30 as an outlier and removing it increases the mean by about 5.

4. The set has 30 as an outlier and removing it decreases the mean by about 10.

Answer 1

@cvliboi @winsteria @magic_jukebox @Niguyver @niccco_ @abb0t @bohotness

Answer 2

Is there a number that is way different from the rest?

Answer 3

no

Answer 4

Look at the data set again, does 30 seem to fit with the rest of the numbers?