Question

Perform t-test on eRPM for strategy A and B. H0: A = B vs. H1: A != B (Two-sided t-test) What is the p-value?

Strategy	Date	eRPM
A	15-Jun-14	3.47
A	16-Jun-14	3.25
A	17-Jun-14	3.32
A	18-Jun-14	3.46
A	19-Jun-14	3.58
A	20-Jun-14	3.48
A	21-Jun-14	3.48
A	22-Jun-14	3.46
A	23-Jun-14	3.34
A	24-Jun-14	3.33
A	25-Jun-14	3.37
A	26-Jun-14	3.53
A	27-Jun-14	3.67
A	28-Jun-14	3.83
A	29-Jun-14	3.78
A	30-Jun-14	3.48
B	15-Jun-14	3.34
B	16-Jun-14	3.3
B	17-Jun-14	3.33
B	18-Jun-14	3.6
B	19-Jun-14	3.85
B	20-Jun-14	3.89
B	21-Jun-14	3.69
B	22-Jun-14	3.64
B	23-Jun-14	3.6
B	24-Jun-14	3.42
B	25-Jun-14	3.41
B	26-Jun-14	3.72
B	27-Jun-14	3.94
B	28-Jun-14	4.07
B	29-Jun-14	4.05
B	30-Jun-14	3.69

Answer 1

code:

library(readxl)
data1<-read_excel(path="C:/Users/HP/Desktop/Book2.xlsx")
summary(data1)

t.test(eRPM~Strategy,data=data1)

output:

Analysis:

Ho: meanA = meanB

H1: meanA =/= meanB

t=-2.2542

p-value = 0.033

With t(25) = -2.2542, p<5%, i reject ho and conclude that meanA =/= meanB