Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)

Question

Sample Number Mean Std. Dev.
1 25 38.6 13.7
2 29 42.1 10.2

Answer 1

t= (38.6-421)/sqrt (13.7^2/25 + 10.2^2/29))

Answer 2

I came up with -114.80229

Answer 3

There was typo
t= (38.6-42.1)/sqrt (13.7^2/25 + 10.2^2/29))

t = -1.05