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##ch 9 problem 5 ch9_prob5_data <- read.csv("C:/Users/benny/Downloads/ch9_prob5_data.csv") View(ch9_prob5_data) data=ch9_prob5_data t.test(data$control) t.test(data$treatment) var.test(data$treatment,data$control) t.test(data$treatment,data$control,var.equal = TRUE) ##problem 6 dee=(3-0)/sd(difference) install.packages("pwr") library(pwr) pwr.t.test(n=30,d=dee,sig.level=0.05,type="paired") ##prob 7 ch9_prob7_data <- read.csv("C:/Users/benny/Downloads/ch9_prob7_data.csv") data7=ch9_prob7_data t.test(data7$treatment-data7$control) var.test(data7$treatment,data7$control) t.test(data7$treatment,data7$control,var.equal = TRUE)
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