Let X be the iq score of adults. X is normally distributed with mean of 100 and standard deviation of 20.
If all iq scores are converted to z -scores then we will get z scores. And the z score is standard normal variable with mean=0 and standard deviation =1
Hence the mean and standard deviation of of all z scores will be 0 and 1 respectively.
Answer:
8
Step-by-step explanation:
32/4
49 pieces because 7/8 is equivalent to 49/56. If each piece is 1/56, then there 49 of them.
Answer:
272
Step-by-step explanation:
note that (f • g)(x) = f(x) × g(x) = (3x - 7)(4x - 5)
To evaluate substitute x = 3 into (3x - 7)(4x - 5)
(f • g)(- 3) = (- 9 - 7)(- 12 - 5) = - 16 × - 17 = 172
