Answer and Step-by-step explanation:
a)
expected value for the difference in sample means=3.5-3.2=0.3
b)
standard deviation of the sampling distribution of the difference in sample means
=sqrt((0.5^2/40)+(0.8^2/40))
=0.1492
c)
z=(0.3-0)/0.1492
z=2.01
P(z>2.01)=0.0222
Answer:
the answer is b i think
Step-by-step explanation:
Answer:
dilation is an enlargment and the scale factor is 2
Step-by-step explanation:
Answer: a
Step-by-step explanation:
