7.4 Topic 4: Correlation and Regression30. What does correlation do? Select the correct word to complete each sentence.(a) Correlation measures the strength of the relationship between twovariables.(categorical/quantitative(b) Correlation measures strength(and/not) direction of the relationship.(linear/all) relationships.(increases/decreases/remains the same) when the units are converted(c) Correlation is appropriate for(d) Correlationfrom feet to inches.31. A detailed study of the veined squid (Loligo forbesii) by Emam et al. showed several interestinglinear relationships in body proportions. Consider the following related data sets.Data 1 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4Mantel Length: 0.4, 1.5, 3.7, 3.6, 4.3, 4.5, 4.9Data 2 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4Fin Length: 2.3, 2.4, 3.2, 2.9, 3.8, 4.6, 4.3(a) Find the correlation of each data set.(b) Is mantel length or fin length better for predicting mantel width? Explain.32. Match the correlation with the plot in Figure 7.8.(a) -0.3796(b) 0.3705(d) -0.9564(c) 0.9271Figure 7.8: Matching CorrelationsPlot 2Plot 1102.10Plot 4Plot 3104.8.-8-2

Question
Asked Feb 7, 2020
343 views

Question 31 parts A and B

7.4 Topic 4: Correlation and Regression
30. What does correlation do? Select the correct word to complete each sentence.
(a) Correlation measures the strength of the relationship between two
variables.
(categorical/quantitative
(b) Correlation measures strength
(and/not) direction of the relationship.
(linear/all) relationships.
(increases/decreases/remains the same) when the units are converted
(c) Correlation is appropriate for
(d) Correlation
from feet to inches.
31. A detailed study of the veined squid (Loligo forbesii) by Emam et al. showed several interesting
linear relationships in body proportions. Consider the following related data sets.
Data 1 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4
Mantel Length: 0.4, 1.5, 3.7, 3.6, 4.3, 4.5, 4.9
Data 2 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4
Fin Length: 2.3, 2.4, 3.2, 2.9, 3.8, 4.6, 4.3
(a) Find the correlation of each data set.
(b) Is mantel length or fin length better for predicting mantel width? Explain.
32. Match the correlation with the plot in Figure 7.8.
(a) -0.3796
(b) 0.3705
(d) -0.9564
(c) 0.9271
Figure 7.8: Matching Correlations
Plot 2
Plot 1
10
2.
10
Plot 4
Plot 3
10
4.
8.
-8
-2
help_outline

Image Transcriptionclose

7.4 Topic 4: Correlation and Regression 30. What does correlation do? Select the correct word to complete each sentence. (a) Correlation measures the strength of the relationship between two variables. (categorical/quantitative (b) Correlation measures strength (and/not) direction of the relationship. (linear/all) relationships. (increases/decreases/remains the same) when the units are converted (c) Correlation is appropriate for (d) Correlation from feet to inches. 31. A detailed study of the veined squid (Loligo forbesii) by Emam et al. showed several interesting linear relationships in body proportions. Consider the following related data sets. Data 1 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4 Mantel Length: 0.4, 1.5, 3.7, 3.6, 4.3, 4.5, 4.9 Data 2 Mantel Width: 2.5, 2.1, 2.6, 3, 3.5, 4, 4.4 Fin Length: 2.3, 2.4, 3.2, 2.9, 3.8, 4.6, 4.3 (a) Find the correlation of each data set. (b) Is mantel length or fin length better for predicting mantel width? Explain. 32. Match the correlation with the plot in Figure 7.8. (a) -0.3796 (b) 0.3705 (d) -0.9564 (c) 0.9271 Figure 7.8: Matching Correlations Plot 2 Plot 1 10 2. 10 Plot 4 Plot 3 10 4. 8. -8 -2

fullscreen
check_circle

Expert Answer

Step 1

a).

The correlation between Mantel Width and Mantel length is as follows:

Step-by-step procedure to obtain the correlation using Excel is as follows:

  • First enter the data set into Excel spread sheet.
  • Go to data option in ribbon pan.
  • Select data analysis.
  • Click on Correlation and select the input range.
  • Click Ok.
Step 2

Output obtained using Excel is represented as follows:

Statistics homework question answer, step 2, image 1

Thus, the correlation between Mantel Width and Mantel length is 0.8114.

Step 3

The correlation between Mantel Width and Fin length is as follows:

Step-by-step procedure to obtain the correlation using Excel is as follows:

  • First enter the data set into Excel spread sheet.
  • Go to data option in ribbon pan.
  • Select data analysis.
  • Click on Correlation and select the input range.
  • Click ok.

Output obtained using Excel is as follows:

Statistics homework question answer, step 3, image 1

Fro...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.

Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: If a procedure meets all of the conditions of a binomial distribution except the number of trials is...

A: It is given that the probability of getting a universal donor is, p=0.07. Therefore, probability of ...

question_answer

Q: A student wants to buy 3 CDs. Assume that they are interested in 3 CDs featuring the piano, 6 CDs fe...

A: In this context, the total number of CDs interest by a student is 14(=3+6+5).a.The number of differe...

question_answer

Q: Could you help me interpret and solve number 11?

A: In this context, the aim is to find the total number of commuters leaving each zone, the total numbe...

question_answer

Q: Of all the students who take the CPA examination, one-fourth have a Master’s degree and the remainde...

A: One-fourth of the students have a Master’s degree, the remaining students have Bachelor’s degree. Ha...

question_answer

Q: To predict the outcome of an election, 2500 likely voters are randomly selected to take a survey. (a...

A: Random Sampling It is the sampling technique where each unit of the population has an equal chance o...

question_answer

Q: Determine whether the study depicts an observational study or an experimental study. A study was ...

A: Study: The study 4 groups of children and each group have treated with different amounts of sugar. T...

question_answer

Q: Sampling Techniques: A college professor wants to determine the average age of students taking Stati...

A: Method 1: Stratified sampling In this method, the population is first divided into subgroups (or str...

question_answer

Q: True or False? The margin of error for a confidence interval for a population is equivalent to the s...

A: In general, the formula for finding the margin of error when the population standard deviation is kn...

question_answer

Q: The points on a scatterplot lie close to the line whose equation is y=9x−7y=9x−7. The slope of the l...

A: Solution: It is given that:The points on a scatterplot lie close to the line whose equation is y=9x−...