As a result of dog breeding for certain physical traits, many dog breeds have changed in the last 100 years. a dog breeder wants to measure the effects of breeding on the face length of the boxer breed using a hypothesis test. suppose that the dog breeder has face length measurements (in inches) from a random sample of 40 female boxer dogs taken in 1915 and a random sample of 40 female boxer dogs taken in 2015. which type of hypothesis test should the breeder use?

How does a gymnosperm prevent itself from pollinating the same tree

The arrows indicate the direction of wind flow. which place experiences monsoons?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.