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
16 people would be at the dinner because Jim and Sarah invited 7 friends and each friend brought 1 guest, so you do 7*2=14 and the 14 + Jim and Sarah=16 people.
<span> 3a^3+8a-6
+4a^2-9a+11
=3a^3+4a^2-a+5
</span>
2z +7 = -5
2z = -5 -7
2z = -12
z= -12 /2
z= -6