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?
Answers: 1
Mathematics, 21.06.2019 16:50, angelkiss2019
1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?
Answers: 1
Mathematics, 21.06.2019 23:00, ReveenatheRaven2296
The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points
Answers: 1
Mathematics, 21.06.2019 23:00, spaigenicole
Someone answer this asap for the first five terms of a sequence are shown. 5, 11, 23, 47, 95, . . which recursive function defines the nth term in the sequence for n > 1? a. f(n) = f(n - 1) + 6 b) f(n) = f(n - 1) + 48 c) f(n) = 3 • f(n - 1) + 1 d) f(n) = 3 • f(n - 1) - 4
Answers: 1
2. T-test for dependent means
You want to see if completion of PSY-3205 has changed the overall hap...
English, 23.06.2019 23:40
Mathematics, 23.06.2019 23:40
Physics, 23.06.2019 23:40