Answer:
A and B
Step-by-step explanation:
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:
c.
Step-by-step explanation:
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To find equivalent expressions,
distribute the first one and
factor the second one.
y - 5.3 = 1.3 (I x + 6.1 )
the equation of a line in ' point- slope form ' is
y - b = m (x - a) → m is the slope and ( a , b ) a point on the line
here m = 1.3 and ( a , b ) = ( - 6.1 , 5.3 )
y - 5.3 = 1.3 ( x -( - 6.1)) ⇒ y - 5.3 = 1.3 ( x + 6.1 )