The local university is trying to determine if the pedagogy of group assignments
ID: 3229566 • Letter: T
Question
The local university is trying to determine if the pedagogy of group assignments is detrimental or beneficial to learning statistics. The population GPA for statistics classes is mu = 68.5, using the traditional lecture-style learning. A sample of classes using the group assignments, along with lecture. Information needed: N = 10; X-bar 78.5, sigma X = 785, sigmaX^2 = 62, 797.0, S-hat (estimated standard deviation) = 11.424. Find the standard error S_X - bar: a. 3.613 b. 4.230 c. 2.980 d. 4.900 Find df:____ a. 8 b. 10 c. 9 d. 11 Find t_erit for alpha = .05:___ a. 1.833 b. 2.262 c. 1.812 d. 2.306 Find t_test value:____ a. 3.610 b. 2.768 c. 1.812 d. 2.980 Is this a one-tailed or is it a two-tailed test: ____ a. one-tailed b. two-tailed Provide the H_0: ___ a. H_0: mu = 78.5 b. H_0: mu notequalto 68.5 c. H_0 mu notequalto 78.5 d. H_0: mu = 68.5 Provide the H_a:____ a. H_a: mu = 78.5 b. H_a: mu notequalto 68.5 c. H_a: mu notequalto 78.5 d. H_a: mu = 68.5 Would you accept or reject the H_0: ___ a. Rejects b. Accept Which conclusion best describes the results: a. The researchers reject the null because the results reveal a statistically significant difference, at alphaExplanation / Answer
9) std error=std deviation/(n)1/2 =3.613 option A
10)df =n-1=9
11) tcrit: =2.262
12)t test =(X-mean)/std error =(78.5-68.5)/3.613=2.768
13)twoi tailed
14)option d
15)option b
16)reject
17)option A
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.