QUESTIONS, DISPLAYS AND SUMMARY STATISTICS

Question, displays and summary statistics

Does the median birth weight for VLBW babies that do not survive tend to be lighter than the median birth weight for VLBW babies that do survive? The variable I will be investigating is VLBW in babies. This information comes from a data set containing the birth weight of VLBW babies born in America in the 1980s.

Variable: Birth weight (g)

Group: Survivors and non-survivors.

Population: VLBW Babies

Parameter: Difference between medians (g)

STEP 2: SELECT AND USE APPROPRIATE DISPLAYS AND SUMMARY STATISTICS

Summary of bwt by survival:

        Min.     1st Qu.   Median    Mean   3rd Qu.   Max.   Std.dev   Sample.Size
No     400       700         850         878.2      1030   1450       242           103            
Yes    400      1000       1200       1160        1350   1500       231           477