A sample of 49 people from East Carolina produced a mean of 7 and a standard dev
ID: 3052649 • Letter: A
Question
A sample of 49 people from East Carolina produced a mean of 7 and a standard deviation of 6. A sample of 36 people from New Idaho produced a mean of 42 and a standard deviation of 13. What is the standard error of the random variable representing the difference of the sample means? Give your answer to two decimal places. A sample of 49 people from East Carolina produced a mean of 7 and a standard deviation of 6. A sample of 36 people from New Idaho produced a mean of 42 and a standard deviation of 13. What is the standard error of the random variable representing the difference of the sample means? Give your answer to two decimal places.Explanation / Answer
n1 = 49 ,s1 = 6 , n2= 36 , s2 = 13
standard error = sqrt(s1^2/n1 +s2^2/n2)
= sqrt(6^2/49 + 13^2/36)
= 2.3301