1) Please discuss the advantages and disadvantages of an experimental design with respect to internal and external validity

1) Please discuss the advantages and disadvantages of an experimental design with respect to internal and external validity.

2. A police radar unit measured the speed of 25 cars on Elm Street. The resulting speeds were: 29, 23, 30, 30, 27, 24, 30, 25, 23, 28, 25, 24, 28, 30, 23, 30, 27, 25, 29, 24, 23, 26, 30, 28, and 25.

 Makefrequency distribution table that includes the frequency, percent, cumulative frequency, and cumulative percent. Round final answers to the 2nd decimal place.

3. Please define the principles of respect for persons, beneficence, and justice and explain why they are important.