Professor Kramer has decided to measure how happy his students are with his teaching this semester. He is teaching two classes this semester—Psychology and Law and Introduction to Neuroscience. He gives his students a survey.

Refer to Research Study 7.1 to answer the following six questions.

In the above scenario, 43 of 50 Introduction to Neuroscience students and 46 of 48 Psychology and Law students complete the survey. Based on this information, which of the following can Dr. Kramer say?
1.
His sample is representative
2.
His sample is larger than his population
3.
His sample came from his population of interest
4.
His sample is biased

1 Is correct. The sample is representative

Explanation:

The great majority of the students complete the survey. This means that the small part that didnt take it shouldnt influence the outcome of the survey very much, thus the survey should reflect accurate results (even assuming that the students that didnt complete the survey arent completly random). As a consecuence his sample is representative. Option 1 is correct.

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )