Question
In: Statistics and Probability
a. Draw a scatter plot. Is this a positive or negative correlation? Explain what a positive correlation and negative correlation are. b.Compute the pearson correlation.
For the following scores,
| x | y |
| 0 | 4 |
| 2 | 9 |
| 1 | 6 |
| 1 | 9 |
a. Draw a scatter plot. Is this a positive or negative correlation? Explain what a positive correlation and negative correlation are. b.Compute the pearson correlation.
Solutions
orchestra answered 2 years agoRelated Solutions
For each exercise: 1. Draw the scatter plot 2. Compute the value of the correlation coefficient...
For each exercise: 1. Draw the scatter plot 2. Compute the value
of the correlation coefficient 3. State the Hypothesis 4. Test the
significance of the correlation coefficient at α = 0.05 5. Give a
brief explanation of the type of relationship
State Debt and Per Capita Tax: An economics student wishes to
see if there is a relationship between the amount of state debt per
capita and the amount of tax per capita at the state level. Based
on...
1.How can we discern positive and negative correlation in a time series plot? A. In a...
1.How can we discern positive and negative correlation in a time
series plot?
A.
In a positive correlation, you will look for the two different
time series to have the same maximum heights above the trend. In a
negative correlation, you will look for the two different times
series to have the same minimum heights.
B.
Two time series are positively correlated when one series is
high (low) and the other series is low (high). Two time series
that are...
What is the purpose of a scatter diagram (Scatter plot)? (Please provide Scatter plot examples)
What is the purpose of a scatter diagram (Scatter plot)? (Please
provide Scatter plot examples)
For the following data (a) display the data in a scatter plot, (b) calculate the correlation...
For the following data (a) display the data in a scatter plot,
(b) calculate the correlation coefficient r, and (c) make a
conclusion about the type of correlation. The ages (in years) of 6
children and the number of words in their vocabulary Age, x 1 2 3
4 5 6
Vocabulary size, y 150 1100 1150 1800 2050 2700
A] The correlation coefficient r is
What are the properties of a correlation? What is a “negative” relation and what is a “positive” relation?
What are the properties of a correlation? What is a
“negative” relation and what is a “positive” relation? Give
examples of each using real variables.
A) Differentiate between perfect negative correlation and perfect positive correlation. B) Explain the concept of diversification...
A) Differentiate between perfect negative correlation and
perfect positive correlation.
B) Explain the concept of diversification in investment
portfolio.
C) What are the two (2) advantages of Payback Period?
D) Amaryllis Incorporated is attempting to evaluate the
feasibility of investing RM95,000 in a piece of equipment that has
a 5-year life. The firm has estimated cash inflows
associated with the proposal as shown in the following table.
The firm has a 12% cost of capital.
A) Differentiate between perfect negative correlation and perfect positive correlation. B) Explain the concept of diversification...
A) Differentiate between perfect negative correlation and
perfect positive correlation.
B) Explain the concept of diversification in investment
portfolio.
C) What are the two (2) advantages of Payback Period?
True or False 1) A correlation coefficient based on a scatter plot measures the proportion of...
True or False
1) A correlation coefficient based on a scatter plot measures
the proportion of data lying on the regression line.
2)Which of the following is/are incorrect statement(s) about the
correlation between two quantitative variables ?X and ?Y?
I. A correlation of -0.8 indicates a stronger linear association
between X and Y than a correlation of 0.5.
II. A correlation of 0 implies ?X and ?Y are not related at
all.
III. A correlation of -1 indicates that ?=−?Y=−X.
What is the correct interpretation for the correlation coefficient r=1r=1? The scatter plot contains points which...
What is the correct interpretation for the correlation
coefficient r=1r=1?
The scatter plot contains points which all lie on a horizontal
line.
The scatter plot contains points which show no discernable
relationship.
The scatter plot contains points that all lie on a line with
negative slope.
The scatter plot contains points that all lie on a line with
positive slope.
Define the following terms: a. correlation coefficient b. scatter plot c. bivariate relationship
Q1: Define the following terms:
a. correlation coefficient
b. scatter plot
c. bivariate relationship
Q2: Provide an example where the outlier is more important to the research than the other observations?
Q3: Identify when to use Spearman’s rho
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