Data collected on the discharge of the Colorado River and speed are given in the table:

Discharge (ft3) Speed
1.3 2.3
2.2 0.99
5.8 3.5
11 5
12 16
14 22
16 27
21 14
49 33

Find r2, and interpret the results. (4 points)

Group of answer choices

0.67; The least-squares regression line, given by ŷ = 3.95 + 0.82x, is a good fit for the data.

0.82; The least-squares regression line, given by ŷ = 3.95 + 0.82x, is not a good fit to the data.

0.82; The least-squares regression line, given by ŷ = 0.82 + 3.95x, is a good fit for the data.

0.67; The least-squares regression line, given by ŷ = 3.95 + 0.67x, is not a good fit for the data.

0.67; The least-squares regression line, given by ŷ = 3.95 + 0.67x, is not a good fit for the data.

Step-by-step explanation:

Plot the data in a spreadsheet and insert a trendline.  The line of best fit is y = 0.67x + 3.95.  The r² value is 0.67.

b is the answer that makes most sense

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.