What is a lurking variable? O A scary variable. A variable that scientists ignore because of ethical issues in the study. A variable that we aren't measuring or controlling, but may influence the outcome of a response variable, and possibly the explanatory variable. O A variable that we are controlling in an experiment so that it doesn't have an effect on our response variable. O A variable that may result in the placebo effect.

its not correct

Please finish the entire question; it has multiple parts.

A student needs to answer 20 out of 30 questions on a test. Find the number of ways the student can choose if the student must answer the first 8 questions on the test.

A chapter in a book begins on page 143 and ends on page 861. How many pages are in the chapter?

I actually need help with number 37.