Plz worth 99 !
leena is arranging 3 different books in a row on a shelf. create a sample space for the arrangement of a detective story (d), a mystery story (m), and a comic book (c).

answer:

(c), (d), (m)

leena thought she could fit them all in but the mystery book was really difficult. every direction she tried to slam the book in the little space left a dent on the selves. in anger she ripped the book in half. soon discovering a solution she put one half of the book in and the other in the trash. leena then cried and had a mental break down. she started eating the books.

step-by-step explanation:

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.