Sketch a scatter gram after assigning variables b. Find the coefficient of correlation and explain if...

Sketch a scatter gram after assigning variables

b. Find the coefficient of correlation and explain if the linear fit is good. (begin at =.05)

c. Find and graph the least squares equation, stating the p-value. The time it takes to complete a construction project versus the size of the crew are noted below:

2. The time it takes to complete a construction project versus the size of the crew are noted below:

CREW HOURS

4 210

9 102

10 90

8 130

4 270

7 140

12 80

20 50

15 70

How long will the job take to complete with a crew of 2?

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

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

A perfect correlation between two variables would be represented by a coefficient of: a. .00 b....

A perfect correlation between two variables would be represented by a coefficient of: a. .00 b. 1.00 c. 2.00 d. 100.00

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.

1. If the linear correlation coefficient of two variables is zero, then there is no _______________...

1. If the linear correlation coefficient of two variables is zero, then there is no _______________ relationship between the variables. A linear correlation coefficient of 0.92 suggests a ________________ linear relationship than a linear correlation coefficient of -0.86. The value of the ___________________ always lies between -1 and 1, inclusive. If the linear correlation coefficient of the regression line is negative, then the ____________________ of the least squares (linear) regression line must be negative. Give a detailed interpretation of the...

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...

For an inverse relationship between two variables, the sign of the correlation coefficient is "+" TRUE...

For an inverse relationship between two variables, the sign of the correlation coefficient is "+" TRUE OR FALSE

Assume that it is appropriate and meaningful to calculate the correlation coefficient of two variables X...

Assume that it is appropriate and meaningful to calculate the correlation coefficient of two variables X and Y. If the correlation coefficient, r, has a value -0.95 Select one: a. it is impossible to tell if there is a linearly relationship between the two variables b. there is a strong linear relationship between the two variables c. there is no relationship between the two variables d. the slope of the regression line will be -0.95 2. The father's height (in...

1. If the coefficient of determination is 25%, the correlation between two continuous variables is a)...

1. If the coefficient of determination is 25%, the correlation between two continuous variables is a) -5 b) 5 c) -.25 d) .25 e) a or b f) none of the above 2. To assess the correlation between height and weight, one should use a) spearman correlation b) regression equation c. pearson correlation d) point biserial correlation 3. For a computed r = -0.547, given a dataset of n = 16, alpha = .05, and two-tailed significance, one should fail...

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.

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

Subjects