According to the World Health Organization (WHO) Child Growth Standards, the head circumference for boys at birth is normally distributed with a mean of 34.5cm and a standard deviation of 1.3cm. What is the z‑score for a boy born with a head circumference of 35.8cm?

the z score is 1

Step-by-step explanation:

Since the head circumference for boys at birth is normally distributed,

we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = head circumference for boys at birth.

µ = mean head circumference

σ = standard deviation

From the information given,

µ = 34.5cm

σ = 1.3 cm

For a boy born with a head circumference of 35.8cm, the z score is

z = (35.8 - 34.5)/1.3

z = 1

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation:

5050

hope this !