The Associated Press (October 9, 2002) reported that in a survey of 4722 American youngsters aged 6 to 19, 15% were seriously overweight (a body mass index of at least 30; this index is a measure of weight relative to height). Calculate and interpret a confidence interval using a 99% confidence level for the proportion of all American youngsters who are seriously overweight.

Week 14: Regression Analysis & χ Testing 6 December 2016 Basic Statistics for Research Professor HK Dong Total variability of Y = variability explained by the linear relation + residual/unexplained variability SST = SSR + SSE Sum of squares total = sum of squares regression + sum of squared error F test = MS – mean sum of squares 1,2 = Test statistic: K = 1 = # of x variables Where F has df 1 1 and df =2n – 2 There is a different F-distribution for each pair of df for the numerator and denominator Only reject large F for α=0.05 H 0 β 1 0 (no linear relationship) H A β 1 0 (x affects y, there is a linear relationship) T test for a population slo