Area under Normal curve with +-1 SD:
Ans. a. 0.68 (Ref Park 23/e p849, 21/e p788; Simple Biostatics by Indrayan and Indrayan Central Tendency in Various Distribution/111: Park 23/e p849, 22/e p849.22/e p792) Area under Normal curve with +- 1 SD is 0.68.In Normal Distributionm +- = 68.3%Qm +- 2 = 95.4% Qm +- 3 = 99.7%QDistributionCentral TendencyNormal (Gaussian) DistributionMean = Median = ModeQRight (Positive) Skew DistributionMean > Median > ModeQLeft (Negative) Skew DistributionMean < Median < ModeQ In Distribution with Extreme Values (Outliers)Most affected measure of central tendencyMeanLeast affected measure of central tendencyModeMost preferable measure of central tendencyMedian
0.68
0.17
0.12
0.34
Measures of Central Tendency and Distribution