Which of the following statements about extraneous variables is not accurate? A. An extraneous variable can also be a confounding variable. B. An extraneous variable clarifies the relationship between the independent and dependent variables. C. An extraneous variable can alter the results of an experiment in an undesired way. D. An extraneous variable cannot be the same as an independent variable. Please select the best answer from the choices provided A B C D

Chicken pox and hepatitis are bacterial diseases. true or false?

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system