![subject](/tpl/images/cats/mat.png)
Mathematics, 18.03.2021 02:30 randallcraig27
2. T-test for dependent means
You want to see if completion of PSY-3205 has changed the overall happiness for students taking the class. In order to do this, you do a repeated measures happiness survey like that described above where you survey a group of N = 4 students before they take the class and survey these same students they take the class.
You obtain the following data:
Student; Happiness Before; Happiness After
1; 4; 2
2; 7; 3
3; 5; 4
4; 4; 1
Let D = (Happiness After) – (Happiness Before) denote your difference score
a) State the null hypothesis (H0) and the research hypothesis (H1)
b) Compute the mean difference score MD
c) Compute the degrees of freedom (df)
d) Fill out the following table and then estimate the standard deviation (sD) of difference scores
D (D-MD) (D-MD)2
SSD :
e) Write the expression for your T-statistic, and plug in the numbers to compute the t-score
f) Using the attached T-score table, for a 2-tailed test is your observation significant at the level of p<0.05? How about p < 0.01?
g) Compute Cohen’s d
h) What is the 95% confidence interval for the true difference? Does it contain zero?
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 17:30
Can someone me and do the problem plz so i can understand it more better
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:00
Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:30
Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.
Answers: 1
![question](/tpl/images/cats/mat.png)
You know the right answer?
2. T-test for dependent means
You want to see if completion of PSY-3205 has changed the overall hap...
Questions
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.08.2019 17:10
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.08.2019 17:10
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.08.2019 17:10
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.08.2019 17:10
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 22.08.2019 17:10
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)