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when the outlier(s) are removed, how does the mean change?

dot plot with 1 dot over 18, 2 dots over 34, 3 dots over 38, 2 dots over 40, 3 dots over 44, 2 dots over 46, and 2 dots over 48

the mean decreases by 2.1.
the mean increases by 1.6.
the mean increases by 2.1.
there are no outliers.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

What is the factored form of the following expressions? d^2 – 13d + 36

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders