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

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=(x-\mu)/(\sigma)` the value of z for x= 31 we get

`z=(31-35)/(2)=-2`

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