This is a one tailed test
p value = 0.021
0.05 is the level of significance
As p value < 0.05 Reject H0
There is sufficient evidence to conclude that about the average
weight of pigeons in her city
Research studies have shown that the weights of common wood pigeons tend to be normally distributed...
Research studies have shown that the weights of common wood pigeons (Columba palumbus) tend to be normally distributed with a mean weight of 450 grams. A scientist living in Athens, Greece, has noticed smaller pigeons in the city recently and questions whether some environmental factor is causing the city pigeons to be of lesser average weight than would normally be expected. To investigate this matter, she conducts a hypothesis test at the α = 0.05 level of significance. After collecting...
In Green Bay and Appleton, Wisconsin, the average height of hemlock trees is normally distributed within each city. Lilith is trying to determine if one town’s trees are taller than the other town’s trees before deciding where to start her tree farm. Her horticultural knowledge reveals that the standard deviation of the height of similar types of trees is the same everywhere in Wisconsin. So she conducts a test to compare the two populations assuming the same variance within each...