Unformatted text preview: s SS = 48 and a second sample has SS=32. Assuming n=5 for both samples, find the pooled variance estimate. SS
48
SS
32
2
s12 =
, s12 =
, s12 = 12 s2 =
, s12 =
, s12 = 8 n !1
4
n !1
4
SS + SS1
48 + 32
80
s 2 ed = 1
, s 2 ed =
, s 2 ed = , s 2 ed = 10 pool
pool
pool
pool
df1 + df2
4+4
8
15) In a different two
sample study, one sample has SS = 48 with n=5, and a second sample has SS=32 with n = 9. Find the pooled variance estimate. SS
48
SS
32
2
, s12 =
, s12 = 12 s2 =
, s12 =
, s12 = 4 n !1
4
n !1
8
SS + SS1
48 + 32 2
80
s 2 ed = 1
, s 2 ed =
, s pooled = , s 2 ed = 6.667 pool
pool
pool
df1 + df2
4+8
12
16) Two separate samples receive two different treatments. The first sample has n=9 with SS=710, and the second sample has n=6 with SS = 460. Using this information, calculate the estimated standard error of the mean difference that we would use to calculate the t
statistic. Note: Remember that you...
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This note was uploaded on 02/17/2013 for the course PSYC 60 taught by Professor Ard during the Fall '08 term at UCSD.
 Fall '08
 Ard
 Psychology

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