We are interested in whether there is a relationship between the rank of a state and the year it entered the Union.
Let year be the independent variable and rank be the dependent variable.
What do you think the scatter plot will look like? Make a scatter plot of the data.
Why must the relationship be positive between the variables?
Calculate the least squares line. Put the equation in the form of:
Find the correlation coefficient. What does it imply about the significance of the relationship?
Let’s say a fifty-first state entered the union. Based upon the least squares line, when should that have occurred?
Using the least squares line, how many states do we currently have?
Why isn’t the least squares line a good estimator for this year?
0.9553
1934
Below are the percents of the U.S. labor force (excluding self-employed and unemployed ) that are members of a union. We are interested in whether the decrease is significant. (Source:
Bureau of Labor Statistics, U.S. Dept. of Labor )
Year
Percent
1945
35.5
1950
31.5
1960
31.4
1970
27.3
1980
21.9
1986
17.5
1993
15.8
Let year be the independent variable and percent be the dependent variable.
What do you think the scatter plot will look like? Make a scatter plot of the data.
Why will the relationship between the variables be negative?
Calculate the least squares line. Put the equation in the form of:
Find the correlation coefficient. What does it imply about the significance of the relationship?
Based on your answer to (e), do you think that the relationship can be said to be decreasing?
If the trend continues, when will there no longer be any union members? Do you think that will happen?
The next two questions refer to the following information: The data below reflects the 1991-92 Reunion Class Giving. (Source:
SUNY Albany alumni magazine )
Class Year
Average Gift
Total Giving
1922
41.67
125
1927
60.75
1,215
1932
83.82
3,772
1937
87.84
5,710
1947
88.27
6,003
1952
76.14
5,254
1957
52.29
4,393
1962
57.80
4,451
1972
42.68
18,093
1976
49.39
22,473
1981
46.87
20,997
1986
37.03
12,590
We will use the columns “class year” and “total giving” for all questions, unless otherwise stated.
What do you think the scatter plot will look like? Make a scatter plot of the data.
Calculate the least squares line. Put the equation in the form of:
Find the correlation coefficient. What does it imply about the significance of the relationship?
For the class of 1930, predict the total class gift.
For the class of 1964, predict the total class gift.
For the class of 1850, predict the total class gift. Why doesn’t this value make any sense?
0.8302
$1577.48
$11,642.68
-$22,105.33
We will use the columns “class year” and “average gift” for all questions, unless otherwise stated.
What do you think the scatter plot will look like? Make a scatter plot of the data.
Calculate the least squares line. Put the equation in the form of:
Find the correlation coefficient. What does it imply about the significance of the relationship?
For the class of 1930, predict the average class gift.
For the class of 1964, predict the average class gift.
For the class of 2010, predict the average class gift. Why doesn’t this value make any sense?
Questions & Answers
I'm interested in biological psychology and cognitive psychology
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
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Source:
OpenStax, Collaborative statistics homework book: custom version modified by r. bloom. OpenStax CNX. Dec 23, 2009 Download for free at http://legacy.cnx.org/content/col10619/1.2
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