Suppose we have the following data:

Y = [ 55 71; ... 42 67; ... 40 60; ... 38 57 ]; E = [ 5 6; ... 8 7; ... 9 9; ... 10 10 ];

The matrix Y contains outcomes from a learning experiment. The first and second column contain performance observations for four age groups before and after training respectively. The matrix E contains error measurements (i.e., standard error of the mean) that correspond to the values in Y.

Reproduce the figure below using Matlab code and the matrices Y and E. Note that the blue and red bars correspond to the Y values and the length of errorbars correspond to the E values.

Requirements:

1) Your code should reproduce all aspects of the illustration below

2) Your Matlab figure should have error bars that extend upward only

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