Question

When the outliers are removed, how does the mean change?

dot plot with 1 on 18, 2 on 38, 1 on 40, 3 on 44, 1 on 46, 1 on 48

The mean decreases by 2.75.
The mean increases by 2.75.
The mean increases by 3.25.
There are no outliers.

Answer 1

B

Step-by-step explanation: Took the test

Answer 2

Explanation:

Let us calculat the average medians first

Average (mean): μ=39

Minimum: 18

Maximum: 48

Variance: 99.6666666667

Standard deviation σ=9.98331942125

Corrected sample standard deviation s=10.9361784916

Coefficient of variation cV=0.280414833118

Signal-to-noise ratio SNR=3.5661451603

Median: 42

Outlier -18

When we remove 18, the average becomes

Mean =43.2

Setwise:

Mean of dot plot 1=32

When outlier removed mean =39