Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. a medical researcher tested for a difference in systolic blood pressure levels between male and female students who are 12 years of age. she randomly selected four males and four females for her study. this is an ▼ because the researcher ▼ does not attempt to modify applies a treatment to the individuals. what is a major problem with the study? a. there is no blinding, which has a high chance of leading to bias. b. the sample includes male and female students. c. this is a convenience sample with voluntary response, which has a high chance of leading to bias. d. the sample is too small.

Observational study/The sample is too small

Explanation:

The study is observational since there is no attempt to modify nor apply any kind of treatment.

An important problem in this study is the quantity of the sample. It is explained that the research selected only 8 individuals, which is not a significant sample. The minimum number of samples should be at least 30.

the 4th option is the answer

well, paralell is parallel. i am providing links to .

hope this !

a series circuit is one with all the loads in a row. there is only one path for the electricity to flow. if this circuit was a string of light bulbs, and one blew out, the remaining bulbs would turn off.

unlike in series circuits, a charge in a parallel circuit encounters a single voltage drop during its path through the external circuit. the current through a given branch can be predicted using the ohm's law equation and the voltage drop across the resistor and the resistance of the resistor.

a parallel circuit has certain characteristics and basic rules: a parallel circuit has two or more paths for current to flow through. voltage is the same across each component of the parallel circuit.