SAV files are primarily associated with SPSS statistical analysis software by IBM. 30% of SAV files are SPSS data files, typically 1-1 MB in size. 20% are Unreal Engine 4 save game files, typically 6 KB. Remaining 50% have various formats including JSON, DOC, and zlib
SPSS syntax contains instructions for data analysis and editing. Syntax Editor is recognized by orange icon in left top corner. Syntax can be pasted from menus or typed directly
Levene's test examines if 2+ populations have equal variances on a variable. Requires independent observations and quantitative test variable. Homogeneity of variance assumption needed when sample sizes differ sharply
Normality assessment is crucial for parametric statistical tests. Two main methods exist: graphical and numerical assessment. Statistical tests provide objective judgement but may be sensitive to sample size. Graphical interpretation offers better judgement but lacks objectivity
Two-way ANOVA compares mean differences between groups based on two independent variables. Test determines if there is an interaction between independent variables and dependent variable. Three-way ANOVA needed for three independent variables or two-way ANCOVA for continuous covariates
Battery life compared by material type and operating temperature. 36 batteries randomly assigned to each material and temperature level. Battery life measured in hours across three temperature conditions