Refer to the accompanying scatterplot.

a. examine the pattern of all 1010 points and subjectively determine whether there appears to be a strong correlation between x and y.

b. find the value of the correlation coefficient r and determine whether there is a linear correlation.

c. remove the point with coordinates (1010,22) and find the correlation coefficient r and determine whether there is a linear correlation.

d. what do you conclude about the possible effect from a single pair of values

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.

77

step-by-step explanation:

answer: its c because when it has a magnet next to it it will move away from the mixture. hope this

step-by-step explanation: