Question

Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 20.Use the range rule of thumb to find the values separating results that are significantly low or significantly high.

Answer 1

The question said we should us the range rule of thumb to find the values seperating results of that are significantly low or significantly high.

To do this:

2 Standard deviation value above and below mean are significantly low and significantly high.

So,

Significantly low value = mean - 2 * standard deviation

mean = 15

Standard deviation = 1.9

Significantly low value = 15 - 2 * 1.9

Significantly low value = 15 - 3.8

Significantly low value = 11.2

Significantly high value = mean + 2 * 1.9

Significantly high value = 15 + 3.8

Significantly high value = 18.8

Therefore,

Significantly low value = 12.2

Significantly high value = 18.8