Please help me I need URGENT help!! T-test for dependent means
You want to see if the 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?

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce