Use the given data set to complete parts (a) through (c) below. (Use a = 0.05.) 10 8 13 12.73 7.45 6.77 Click here to view a table of critical values for the correlation coefficient. X y a. Construct a scatterplot. Choose the correct graph below. OA Ay 16- 12- 8- 4 ● ** 14 8 12 16 Q 5 OB. Ay 16- 12- 8- 4- 0- 0 9 7.12 8 12 16 11 7.81 BECED 14 8.85 Dia A 16- 12- 8- 4. **** 18 6 6.08 ****** 12 16 Q C 4 5.38 12 8.14 A 16- 12- 8 4 10- 7 6.43 ********* 8 12 16 ROO b. Find the linear correlation coefficient, r, then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables. The linear correlation coefficient is r=1 (Round to three decimal places as needed) 5 5.7

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Please answer part b
### Statistical Analysis and Correlation

**Use the given data set to complete parts (a) through (c) below. (Use \( \alpha = 0.05 \))**

\[
\begin{array}{|c|c|c|c|c|c|c|c|c|c|c|}
\hline
x & 10 & 8 & 13 & 9 & 11 & 14 & 6 & 4 & 12 & 7 & 5 \\
\hline
y & 7.45 & 6.77 & 12.73 & 7.12 & 7.81 & 8.85 & 6.08 & 5.38 & 8.14 & 6.43 & 5.72 \\
\hline
\end{array}
\]

*Click here to view a table of critical values for the correlation coefficient.*

#### a. Construct a Scatterplot. Choose the correct graph below.

Select the scatterplot that corresponds to the given data points.

- **Option A:**
  - This scatterplot shows a non-linear pattern with varying increases and decreases in y-values as x-values increase.

- **Option B:**
  - This scatterplot shows a clear upward trend, with y-values increasing as x-values increase.
  
- **Option C:**
  - This scatterplot shows a downward trend, with y-values decreasing as x-values increase.

- **Option D:**
  - This scatterplot (marked as correct) shows a general upward trend, indicating a positive association between the variables x and y.

#### b. Find the Linear Correlation Coefficient

*Find the linear correlation coefficient, \( r \), then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables.*

\[
\text{The linear correlation coefficient is } r = \underline{\phantom{000}} \quad \text{(Round to three decimal places as needed.)}
\]

---

By analyzing scatterplot D, it is clear that there is a general positive trend, which hints at a positive linear correlation between the variables x and y. This positive trend suggests that as x increases, y tends to increase as well, albeit with some variability.

Note that mathematical computation is required to find the exact value of \( r \), using the statistical formula for the linear correlation coefficient. This value will then be
Transcribed Image Text:### Statistical Analysis and Correlation **Use the given data set to complete parts (a) through (c) below. (Use \( \alpha = 0.05 \))** \[ \begin{array}{|c|c|c|c|c|c|c|c|c|c|c|} \hline x & 10 & 8 & 13 & 9 & 11 & 14 & 6 & 4 & 12 & 7 & 5 \\ \hline y & 7.45 & 6.77 & 12.73 & 7.12 & 7.81 & 8.85 & 6.08 & 5.38 & 8.14 & 6.43 & 5.72 \\ \hline \end{array} \] *Click here to view a table of critical values for the correlation coefficient.* #### a. Construct a Scatterplot. Choose the correct graph below. Select the scatterplot that corresponds to the given data points. - **Option A:** - This scatterplot shows a non-linear pattern with varying increases and decreases in y-values as x-values increase. - **Option B:** - This scatterplot shows a clear upward trend, with y-values increasing as x-values increase. - **Option C:** - This scatterplot shows a downward trend, with y-values decreasing as x-values increase. - **Option D:** - This scatterplot (marked as correct) shows a general upward trend, indicating a positive association between the variables x and y. #### b. Find the Linear Correlation Coefficient *Find the linear correlation coefficient, \( r \), then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables.* \[ \text{The linear correlation coefficient is } r = \underline{\phantom{000}} \quad \text{(Round to three decimal places as needed.)} \] --- By analyzing scatterplot D, it is clear that there is a general positive trend, which hints at a positive linear correlation between the variables x and y. This positive trend suggests that as x increases, y tends to increase as well, albeit with some variability. Note that mathematical computation is required to find the exact value of \( r \), using the statistical formula for the linear correlation coefficient. This value will then be
### Table of Critical Values for the Correlation Coefficient

This table provides the critical values for the Pearson correlation coefficient at significance levels of \(\alpha = 0.05\) and \(\alpha = 0.01\). It is a valuable reference for hypothesis testing when evaluating the strength and significance of the relationship between two variables.

| \( n \) | \(\alpha = 0.05\) | \(\alpha = 0.01\) |
|--------|------------------|------------------|
| 4      | 0.950            | 0.990            |
| 5      | 0.878            | 0.959            |
| 6      | 0.811            | 0.917            |
| 7      | 0.754            | 0.875            |
| 8      | 0.707            | 0.834            |
| 9      | 0.666            | 0.798            |
| 10     | 0.632            | 0.765            |
| 11     | 0.602            | 0.735            |
| 12     | 0.576            | 0.708            |
| 13     | 0.553            | 0.684            |
| 14     | 0.532            | 0.661            |
| 15     | 0.514            | 0.641            |
| 16     | 0.497            | 0.625            |
| 17     | 0.482            | 0.606            |
| 18     | 0.468            | 0.590            |
| 19     | 0.456            | 0.575            |
| 20     | 0.444            | 0.561            |
| 25     | 0.396            | 0.505            |
| 30     | 0.361            | 0.465            |
| 35     | 0.335            | 0.430            |
| 40     | 0.312            | 0.402            |
| 45     | 0.294            | 0.378            |
| 50     | 0.279            | 0.361            |
| 60
Transcribed Image Text:### Table of Critical Values for the Correlation Coefficient This table provides the critical values for the Pearson correlation coefficient at significance levels of \(\alpha = 0.05\) and \(\alpha = 0.01\). It is a valuable reference for hypothesis testing when evaluating the strength and significance of the relationship between two variables. | \( n \) | \(\alpha = 0.05\) | \(\alpha = 0.01\) | |--------|------------------|------------------| | 4 | 0.950 | 0.990 | | 5 | 0.878 | 0.959 | | 6 | 0.811 | 0.917 | | 7 | 0.754 | 0.875 | | 8 | 0.707 | 0.834 | | 9 | 0.666 | 0.798 | | 10 | 0.632 | 0.765 | | 11 | 0.602 | 0.735 | | 12 | 0.576 | 0.708 | | 13 | 0.553 | 0.684 | | 14 | 0.532 | 0.661 | | 15 | 0.514 | 0.641 | | 16 | 0.497 | 0.625 | | 17 | 0.482 | 0.606 | | 18 | 0.468 | 0.590 | | 19 | 0.456 | 0.575 | | 20 | 0.444 | 0.561 | | 25 | 0.396 | 0.505 | | 30 | 0.361 | 0.465 | | 35 | 0.335 | 0.430 | | 40 | 0.312 | 0.402 | | 45 | 0.294 | 0.378 | | 50 | 0.279 | 0.361 | | 60
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