Hi I need help fairly quick. Could someone please help with these 3 questions?
T-tests are used when you want to examine differences but you do not know everything about the population. There are three types of t-tests that you may choose to do: one-sample t-test, independent sample t-test, or dependent sample t-test. You can calculate these by hand, in SPSS, or in Excel. The instructions below can be used for SPSS and your textbook offers instructions for using Excel.
Single-sample t-tests
These tests are used when you want to determine the probability that a sample was drawn from a population with a known mean (μ) but with a standard deviation estimated from the sample.
- Click on analyze, compare means, one-sample t-test
- Copy the variables you want to test into the Test Variables box
- Type the population mean into the Test Value box
- Click on options to get:
- Confidence intervals (95% is default)
- Exclude cases analysis by analysis
- If some data is missing, this will drop the data only in analyses where that data is missing.
- Exclude cases listwise
- If you are doing multiple t-tests and have missing data, this will drop participants who have missing data from all t tests
- Click on continue, ok
- The output will display the t-statistic, degrees of freedom (n-1), significance (two-tailed), and the confidence interval
Independent sample t-test
These tests are used when you want to determine the probability that two samples were drawn from the same population with unknown means and standard deviations; both of which are estimated from the sample. No population parameters are specified.
- The data should be entered in one column and should be named as your dependent variable.
- You will need another column of data to identify each group according to number. So, it is a good idea to have two columns of data (one for the IV and one for the DV).
- For the IV column, you should use two consecutive numbers (I usually use 1 and 2)
- Also, be sure to use variable view to name your variables (otherwise this can become very confusing)
Ø First, we need to calculate means for the purpose of interpretation.
Ø Go to analyze, compare means, means
Ø Put your IV in the grouping variable box and your DV in the dependent variable box.
Ø Click OK to get the means and standard deviations
Ø Now, you need to calculate your t-test
Ø Go to analyze, compare means, independent samples t-test
Ø Your IV is the grouping variable
Ø Click on define range and enter 1-2
Ø Put the DV in the dependent variables box.
Ø You can click on options to change the confidence interval (default is 95%)
Ø Click on OK
Ø The output will show you the t-statistic, the significance level, the standard error of the mean, and the confidence interval.
Dependent samples t-test
We use this t-test when we have a repeated measures design such as the same sample completes a pre and post-test and we want to know if there is a difference from one test to the other.
Ø Go to analyze, compare means, paired sample t-test
Ø Select two variables and move into box
Ø Click on OK
Ø The output will give you means for each trial (or pre-post test measure) as well as the t-statistic and significance level
Let’s try a few using the data below. Be sure to attach your printouts and answer the questions below.
- First, perform an independent sample t-test for gender (IV) and pretest scores (DV)
Were there significant gender differences? How do you know? Interpret the results statistically and in words.
2.Then perform an independent sample t-test for gender (IV) and posttest scores (DV) Were there significant gender differences? How do you know? Interpret the results statistically and in words.
3.Now, perform a paired (dependent) sample t-test for pretest and posttest scores.
Were there two scores significantly different? How do you know? Interpret the results statistically and in words.
Data Set Homework 2 (*note 1 = males, 2 = females)
Gender Pretest Posttest
1.00 50.00 80.00
1.00 50.00 70.00
1.00 80.00 70.00
1.00 80.00 50.00
1.00 70.00 50.00
1.00 70.00 50.00
1.00 60.00 60.00
1.00 60.00 80.00
1.00 90.00 80.00
1.00 90.00 90.00
1.00 90.00 80.00
1.00 80.00 90.00
1.00 80.00 90.00
1.00 70.00 70.00
1.00 70.00 80.00
1.00 50.00 80.00
1.00 50.00 70.00
1.00 50.00 70.00
1.00 60.00 60.00
1.00 70.00 80.00
2.00 50.00 70.00
2.00 40.00 50.00
2.00 40.00 80.00
2.00 70.00 80.00
2.00 50.00 70.00
2.00 50.00 80.00
2.00 50.00 90.00
2.00 60.00 90.00
2.00 70.00 90.00
2.00 40.00 80.00
2.00 40.00 80.00
2.00 30.00 70.00
2.00 30.00 70.00
2.00 50.00 60.00
2.00 60.00 80.00
2.00 40.00 80.00
2.00 70.00 80.00
2.00 50.00 70.00
2.00 60.00 70.00
2.00 70.00 90.00
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Hi I Need Help Answering The Following Question Context Is Provided Below Accord
/in Uncategorized /by developerHi I need help answering the following question. Context is provided below.
Synopsis of Jonas’ life:
6 months old – put up for adoption
6 months – 10 yrs- in and out of various foster care and group homes
10 yrs old – adopted
12 yrs old – sent to military school by adopted family to correct behavior
Sexually abused by male authority figure at military school
Jonas reported that he appreciated military school for the structure and found it comforting
The sexual abuse was described as “leaving an incredible mark on him”
Adopted home environment described as “immaculate, strict and neurotic.” In addition Jonas describes his adopted family as:
i. Father – cold, brutal, forbidding.
ii. Mother – could never please her
iii. Sister – 3 years younger and simply perfect
Jonas now is an adult (who identifies as a gay male) and is in counseling for his anger problem regarding two particular events.
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Hi I Need Help Creating A Policy Brief Proposal This Is A Master S Level Course
/in Uncategorized /by developerHi, I need help creating a Policy brief Proposal. This is a master’s level course. I attached the
instructions.
Drawing on several sources of information, including Internet resources and peer-reviewed academic journals, select a topic that affects some portion of the environment (physical, social, workplace environment, enabling healthy behaviors) and population (children, adolescents, young adults, middle age, older adults). Please cite everything that you get from other sources with the text.
1 Running head: COLLEGE STUDENTS BODY ARTS College Students Body ArtsStudents’ NameInstitution 2 COLLEGE STUDENTS BODY ARTSIncreased deviance and conflicts among college going students with…
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Hi I Need Help Fairly Quick Could Someone Please Help With These 3 Questions
/in Uncategorized /by developerHi I need help fairly quick. Could someone please help with these 3 questions?
T-tests are used when you want to examine differences but you do not know everything about the population. There are three types of t-tests that you may choose to do: one-sample t-test, independent sample t-test, or dependent sample t-test. You can calculate these by hand, in SPSS, or in Excel. The instructions below can be used for SPSS and your textbook offers instructions for using Excel.
Single-sample t-tests
These tests are used when you want to determine the probability that a sample was drawn from a population with a known mean (μ) but with a standard deviation estimated from the sample.
Independent sample t-test
These tests are used when you want to determine the probability that two samples were drawn from the same population with unknown means and standard deviations; both of which are estimated from the sample. No population parameters are specified.
Ø First, we need to calculate means for the purpose of interpretation.
Ø Go to analyze, compare means, means
Ø Put your IV in the grouping variable box and your DV in the dependent variable box.
Ø Click OK to get the means and standard deviations
Ø Now, you need to calculate your t-test
Ø Go to analyze, compare means, independent samples t-test
Ø Your IV is the grouping variable
Ø Click on define range and enter 1-2
Ø Put the DV in the dependent variables box.
Ø You can click on options to change the confidence interval (default is 95%)
Ø Click on OK
Ø The output will show you the t-statistic, the significance level, the standard error of the mean, and the confidence interval.
Dependent samples t-test
We use this t-test when we have a repeated measures design such as the same sample completes a pre and post-test and we want to know if there is a difference from one test to the other.
Ø Go to analyze, compare means, paired sample t-test
Ø Select two variables and move into box
Ø Click on OK
Ø The output will give you means for each trial (or pre-post test measure) as well as the t-statistic and significance level
Let’s try a few using the data below. Be sure to attach your printouts and answer the questions below.
Were there significant gender differences? How do you know? Interpret the results statistically and in words.
2.Then perform an independent sample t-test for gender (IV) and posttest scores (DV) Were there significant gender differences? How do you know? Interpret the results statistically and in words.
3.Now, perform a paired (dependent) sample t-test for pretest and posttest scores.
Were there two scores significantly different? How do you know? Interpret the results statistically and in words.
Data Set Homework 2 (*note 1 = males, 2 = females)
Gender Pretest Posttest
1.00 50.00 80.00
1.00 50.00 70.00
1.00 80.00 70.00
1.00 80.00 50.00
1.00 70.00 50.00
1.00 70.00 50.00
1.00 60.00 60.00
1.00 60.00 80.00
1.00 90.00 80.00
1.00 90.00 90.00
1.00 90.00 80.00
1.00 80.00 90.00
1.00 80.00 90.00
1.00 70.00 70.00
1.00 70.00 80.00
1.00 50.00 80.00
1.00 50.00 70.00
1.00 50.00 70.00
1.00 60.00 60.00
1.00 70.00 80.00
2.00 50.00 70.00
2.00 40.00 50.00
2.00 40.00 80.00
2.00 70.00 80.00
2.00 50.00 70.00
2.00 50.00 80.00
2.00 50.00 90.00
2.00 60.00 90.00
2.00 70.00 90.00
2.00 40.00 80.00
2.00 40.00 80.00
2.00 30.00 70.00
2.00 30.00 70.00
2.00 50.00 60.00
2.00 60.00 80.00
2.00 40.00 80.00
2.00 70.00 80.00
2.00 50.00 70.00
2.00 60.00 70.00
2.00 70.00 90.00
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Hi I Need Help Filling Out A Sample Uniform Residential Loan Application For My
/in Uncategorized /by developerHi, I need help filling out a sample Uniform residential Loan Application for my real estate class. It is just a fill in the blank assignment, but i do not have any experience in the field. PLease assist!!!
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Hi I Need Help In Report Writing For This Topic Sexually Transmitted Chlamydial
/in Uncategorized /by developerHi, I need help in report writing for this topic.
Sexually transmitted chlamydial infections are a serious worldwide public health concern, particularly as there is a reported increase in prevalence of infection. Explain what chlamydia is and why chlamydial infection is such a large public health issue. Be sure to include a discussion of current control mechanisms and future alternatives that may assist in alleviating this problem.
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Hi I Need Help On A Statistics Assignment During A Certain Time Tomorrow This As
/in Uncategorized /by developerhi, i need help on a statistics assignment during a certain time tomorrow. This assignment is very important and I am wondering if you can help with it. I will give you $100 when completed, but I am wondering if we can use a different site to communicate.
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Hi I Need Help On My Tutorial Homework The Question Is Breifly Explain The 2 Con
/in Uncategorized /by developerHi i need help on my tutorial homework
The question is
Breifly explain the 2 condition that must be fulfilled for the consumer to maximise utility
6 marks
But is it the same concept as consumer equilibrium
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Hi I Need Help On Home Work Personal And Professional Development Plan I Have Al
/in Uncategorized /by developerhi,
I need help on home work “Personal and Professional Development Plan”I have already prepared goals and action planThanksSurname 1Name:Instructor:Course:Date: Personal Development PlanWhat is my current state?Strengths1. Communicate well with other people2. Positive attitude3. Leadership skillsWeaknesses1….
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Hi I Need Help On These Questions Please But Since I Have A Free Account Tutors
/in Uncategorized /by developerhi i need help on these questions please but since i have a free account tutors can only answer 3 questions. can you just help me answer 3 please thanks
1.What is the correct Lewisformula for chlorine fluoride (clF)? :::Cl – F:::2.The CO2 3ion has how many resonance configurations?1. 22. 43. It does not exhibit resonance.4. 55. 3 3.How…
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SKULL CANDY INC. ANALYSIS 1Introduction Skullcandy Inc. is a company based in the United States of America that was established in 2003 by RickAlden. It was established majorly to design,…
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