Answer:
Step-by-step explanation:
Add 4 to both sides
Divide both sides by 3
Hope this helps!
(Please mark brainliest)
Answer:
Option B) 9.1
Step-by-step explanation:
We are given the following in the question:
Average score = 490.4
Standard deviation = 63.7
Sample size, n = 49
Formula:
Putting values, we get,
Standard error =
Thus, the correct answer is
Option B) 9.1