Answer:
Step-by-step explanation:
Given that IQ mean is 100 and std dev = 12 for normal adults
Std error = 
i.e. sample size should be atleast 97
The required sample size is 97.
This is reasonable as this is greater than 30
Yes. This number of IQ test scores is a fairly large number.
Answer:
C
Step-by-step explanation:
Using sum/difference to product identity
• sin x - sin y = 2 cos(
) sin (
)
with x = 4Θ and y = 2Θ
Then
sin(4Θ) - sin(2Θ)
= 2 cos(
) sin(
)
= 2cos(3Θ)sinΘ → C
his score was increased... so if he is now at 67 and it was increased by 7 so his first grade would have been 60.
Answer:
irrational.
Step-by-step explanation:
√3 is irrational.
product of rational and irrational number is always irrational.
6×√3=6√3
Answer:
( x + 4 ) ( x + 6 )
Step-by-step explanation:
