1 - In a randomized, controlled experiment without a placebo, which of the following could cause us to reject the null hypothesis?

Group of answer choices

A causal relationship between the treatment and the patient's outcome.

The placebo effect.

Random chance

All of the above

2- Let's say we were only interested in testing whether 25% of rabbits had long fur - the breakdown between medium and short fur didn't interest us. Our alternative hypothesis is that 25% of rabbits don't have long fur. Which test could we run?

(Select all that apply)

Z test for proportions

Chi-squared goodness of fit test

Chi-squared test of Independence

Two sample T-test2-