Kara compared the number of text messages 100 students sent in one day and the grade point average (GPA) of each student. The correlation coefficient among the data is –0.9 rounded to the nearest tenth. Based on this information, which statement is MOST likely true? A.
There is correlation but not causation between GPA and the number of text messages.
B.
There is causation but not correlation between GPA and the number of text messages.
C.
There is both correlation and causation between GPA and the number of text messages.
D.
There is neither correlation nor causation between GPA and the number of text messages.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

d no solution

step-by-step explanation: