A new experimental drug has been approved to be tested as a treatment for Parkinson's Disease (PD). I dopa has traditionally been the drug treatment of choice in treating PD. Researchers are interested in whether the new experimental drug will improve symptoms of PD to a greater extent than L-dopa.

A) State the null and research hypotheses

b) Is this a non-directional or a directional hypothesis? How do you know?

c) The hypothetical results indicate that the new experimental drug improved
symptom. Give a conclusion.

D) The hypothetical results indicate that the new experimental drug did not improve symptoms. Give a conclusion

the answer is D the hypothetical results indicate that the new experimentel drug did not improve symptoms

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

5.5

step-by-step explanation: