Question

A chef asks for your advice given that you are a student of business statistics. He tells you that it takes approximately a normally distributed mean of 35 minutes and a standard deviation of 2 minutes to cook a spaguetti and meatball meal. Convert 31 minutes into a z-score given the Z-score formula.

Answer 1

Answer:  -2

Step-by-step explanation:

Given : A chef asks for your advice given that you are a student of business statistics.

He tells you that it takes approximately a normally distributed .$\mu=35$ and $\sigma= 2$ to cook a spaguetti and meatball meal.

Let x be a random variable that represents the time to cook a spaguetti and meatball meal.

Using the formula , $z=\dfrac{x-\mu}{\sigma}$ the value of z for x= 31 we get

$z=\dfrac{31-35}{2}=-2$

Hence, the z-score for 31 minutes = -2