Bootstrapping Bug in SPSS - Fix
Use the URL below to get the SPPS Fix Pack:
https://tinyurl.com/y2oso3xx
Use the URL below to get the instructions to install the Fix Pack:
https://tinyurl.com/y2rtdumm
Here are the examples of the bootstrap syntax I used in the video:
1: Pearson Correlation:
PRESERVE.
SET RNG=MT MTINDEX=2000000.
SHOW RNG.
BOOTSTRAP
/SAMPLING METHOD=SIMPLE
/VARIABLES INPUT=ease overall_quality
/CRITERIA CILEVEL=95 CITYPE=BCA NSAMPLES=2000
/MISSING USERMISSING=EXCLUDE.
CORRELATIONS
/VARIABLES=ease overall_quality
/PRINT=TWOTAIL NOSIG
/MISSING=PAIRWISE.
RESTORE.
2: Multiple Regression:
PRESERVE.
SET RNG=MT MTINDEX=2000000.
SHOW RNG.
BOOTSTRAP
/SAMPLING METHOD=SIMPLE
/VARIABLES TARGET=overall_quality INPUT= interest ease hotness
/CRITERIA CILEVEL=95 CITYPE=BCA NSAMPLES=2000
/MISSING USERMISSING=EXCLUDE.
REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS R ANOVA COLLIN TOL ZPP
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT overall_quality
/METHOD=ENTER interest ease hotness.
RESTORE.
3: Independent Samples t-test:
DATASET ACTIVATE DataSet4.
PRESERVE.
SET RNG=MT MTINDEX=2000000.
SHOW RNG.
BOOTSTRAP
/SAMPLING METHOD=SIMPLE
/VARIABLES TARGET=accuracy INPUT=group
/CRITERIA CILEVEL=95 CITYPE=BCA NSAMPLES=2000
/MISSING USERMISSING=EXCLUDE.
T-TEST GROUPS=group(1 2)
/MISSING=ANALYSIS
/VARIABLES=accuracy
/CRITERIA=CI(.95).
RESTORE.
4: Paired Samples t-test:
DATASET ACTIVATE DataSet1.
PRESERVE.
SET RNG=MT MTINDEX=2000000.
SHOW RNG.
BOOTSTRAP
/SAMPLING METHOD=SIMPLE
/VARIABLES INPUT=ratings interest
/CRITERIA CILEVEL=95 CITYPE=BCA NSAMPLES=2000
/MISSING USERMISSING=EXCLUDE.
T-TEST PAIRS=ratings WITH interest (PAIRED)
/CRITERIA=CI(.9500)
/MISSING=ANALYSIS.
RESTORE.
5: Independent ANOVA with Games-Howell Multiple Comparisons
PRESERVE.
SET RNG=MT MTINDEX=2000000.
SHOW RNG.
BOOTSTRAP
/SAMPLING METHOD=SIMPLE
/VARIABLES TARGET=accuracy INPUT=group
/CRITERIA CILEVEL=95 CITYPE=BCA NSAMPLES=2000
/MISSING USERMISSING=EXCLUDE.
ONEWAY accuracy BY group
/MISSING ANALYSIS
/POSTHOC=GH ALPHA(0.05).
RESTORE.