I need help, algebra is hard
2 answers:
You might be interested in
Answer:
Probability is 0.3506
Step-by-step explanation:
We are given
mean is 8mm
so,
standard deviation is 2.2 mm
so,
x-varies from 7mm to 9mm
At x=7:
we can use formula
we can plug values
At x=9:
we can use formula
we can plug values
So, z is between -0.45455 and 0.45455
now, we can use normal distribution table
and we get
Probability is 0.3506