a) For these data, R² = 0.28. What is the correlation? Round to 2 decimal places. 0.53 How can you tell if it is positive or negative? O We know the correlation is negative due to the negative association shown in the scatterplot We know the correlation is positive due to the negative association shown in the scatterplot We know the correlation is negative due to the positive association shown in the scatterplot O We know the correlation is positive due to the positive association shown in the scatterplot b) Examine the residual plot. What do you observe? Is a simple least squares fit appropriate for these data? O The residuals appear to be fan shaped, indicating non-constant variance, so a simple least squares fit is not appropriate for these data. O The residuals appear to be fan shaped, indicating constant variance, so a simple least squares fit is not appropriate for these data. O The residuals appear to be fan shaped, indicating non-constant variance, so a simple least squares fit is appropriate for these data. O The residuals appear to be fan shaped, indicating constant variance, so a simple least squares fit is appropriate for these data.

Distinguish the correlation shown in the graph below. Summarize why it is the chosen correlation. 30 Use the paperclip button below to attach files. Student can enter max 3000 characters 1- XD 2= DELL to B I U 25 de 2

How does multiplying each score by a (positive) constant affect the value of the correlation? The correlation changes sign. The correlation does not change. The correlation decreases. The correlation increases.

Need the first 3

Use the data values in the table below to calculate the correlation between the variables x and y.Submit the link through Canvas to either a photo of your work on paper or a link to a google sheet. x y 5 15.3 6 20.06 7 21.42 8 24.18 9 28.64 10 31.5 11 31.86 Give your answer to three decimal places.

How strong is this relationship? Obtain the correlation. (Provide your answer to four decimal places.)  r=

Solve this example in the picture below, read the question carefully and answer it correctly. Please solve the work accurately and make sure that you check your work, this deals with correlations.

42

X Frequency 12 a. Construct a histogram for the data with 7 bars 2 1 3 3 4 14 5 15 b. Describe the shape of your histogram c. What does the histogram show us? 7 10 8 5

Solve.