Instructor: This video will briefly describe
how to interpret the upper and lower relative yield values.
Have the relative yield data for two broccoli varieties,
Galaxy and Green Valiant.
As we hover over the top data point for Green Valiant,
we'll see that the upper relative yield value is 89%
and the lower relative yield value is negative 21%.
Based on our statistical analysis, we have 95% confidence
that the true average relative yield for this variety
lies somewhere between the upper
and lower relative yield estimates.
Looking over here at Galaxy,
this has an upper relative yield value of 23%
and a lower relative yield value of 9%,
which is a much smaller range.
To interpret these values,
we can say that we are less certain
about the true mean of varieties like Green Valiant
that have this big range
between the upper and lower relative yield values.
Comparing those varieties with a small range like Galaxy,
those can be viewed as broadly adapted
to a diverse range of environments
because we see that the relative yield values
are less variable.
These types of varieties would be a safe bet
for most growers.
On the other hand,
those with a large range like Green Valiant
may be a high risk or high reward variety
that might do really well or very poorly,
depending on the local conditions of a given farm.