Below is the time it took each of 15 students to complete a Stats test and the score that each student got on the exam. Notice, the last data pair is somewhat unusual. x = Test Time (minutes) y = Score (out of 100) 50 69 63 73 68 80 58 83 77 73 74 72 82 73 74 (a) Find the correlation coefficient. (b) Find the critical value. 67 63 50 63 66 58 56 68 65 67 6 (c) Is there a significant correlation? Yes No (e) Find the critical value. 72 4 88 79 11 (d) Using only the first 14 data pairs, find the correlation coefficient.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
Below is the time it took each of 15 students to complete a Stats test and the score that each student got on the exam. Notice, the last data pair is somewhat unusual.

\[
\begin{array}{c|c}
x = \text{Test Time (minutes)} & y = \text{Score (out of 100)} \\
\hline
50 & 69 \\
63 & 73 \\
68 & 80 \\
58 & 83 \\
67 & 77 \\
63 & 73 \\
50 & 74 \\
63 & 72 \\
66 & 82 \\
58 & 73 \\
56 & 74 \\
68 & 72 \\
65 & 88 \\
67 & 79 \\
6 & 11 \\
\end{array}
\]

**Tasks:**

(a) Find the correlation coefficient.

[  ]

(b) Find the critical value.

[  ]

(c) Is there a significant correlation?
- [ ] Yes
- [x] No

(d) Using only the first 14 data pairs, find the correlation coefficient.

[  ]

(e) Find the critical value.

[  ]
Transcribed Image Text:Below is the time it took each of 15 students to complete a Stats test and the score that each student got on the exam. Notice, the last data pair is somewhat unusual. \[ \begin{array}{c|c} x = \text{Test Time (minutes)} & y = \text{Score (out of 100)} \\ \hline 50 & 69 \\ 63 & 73 \\ 68 & 80 \\ 58 & 83 \\ 67 & 77 \\ 63 & 73 \\ 50 & 74 \\ 63 & 72 \\ 66 & 82 \\ 58 & 73 \\ 56 & 74 \\ 68 & 72 \\ 65 & 88 \\ 67 & 79 \\ 6 & 11 \\ \end{array} \] **Tasks:** (a) Find the correlation coefficient. [ ] (b) Find the critical value. [ ] (c) Is there a significant correlation? - [ ] Yes - [x] No (d) Using only the first 14 data pairs, find the correlation coefficient. [ ] (e) Find the critical value. [ ]
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 8 steps with 21 images

Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman