A study is conducted to determine if one can predict the score a student will ea
ID: 3254081 • Letter: A
Question
A study is conducted to determine if one can predict the score a student will earn on a test based on the number of hours he studies. a. Identify the Explanatory Variable b. Identify the Response Variable When trying to prove a cause-and-effect relationship, what is necessary? Based on a survey of a large sample of adults, researchers collected data based on smoking habits. They recorded if the smoked regularly and if they had cancer. They then compared the data for those who smoked regularly versus those who did not smoke regularly. This is an example of: a. Matched pairs study b. Double-blind experiment c. Census d. Observational Study Explain the following a. Stratified Sampling b. Block Design When performing an experiment, people who phone in response are examples of what type of sampling? When you interview the first few people you see what type of sampling was performed? What does it mean if your data is biased? What type of sample is used when you sort students by ethnicity and then choose a random sample of 3 students from each group?Explanation / Answer
#17) ANS:- Explanatory variable is that variable which is used to explain variability in the response variable, also known as an independent variable or predictor variable in an experimental study, this is the variable that is manipulated by the researcher. and Response variable is the outcome variable, also known as a dependent variable. So in this case , a) Explanatory variable:- no. of hours students studied
b) Response variable:- Score of a students
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