Question

Lee missed the lesson on normal distribution and needs to do his homework. Explain to Lee how to use the mean and standard deviation of a normal distribution to determine the top 6% of the population.

Answer 1

No, @CO_oLBoy I didnt understand what @MathMale was saying

Answer 2

I very much want to know what I am doing here, or rather what I am supposed to be doing, but I haven't learned the things that mathmale was talking about.

Answer 3

YES!!!!!!!!!!! @MathMale is online!!!!!

Answer 4

@GreenEyedGirl yup he'll explain u i gtg go sry

Answer 5

Explain as best you can what you have learned from your online study materials or textbook about solving this type of problem, so that I can discuss this problem in a way that would hopefully be clear to you.

Answer 6

Ok, so there is a graph that looks like a hill. The middle is the mean, but I don't have one of those for you to reference for this problem.......And I think that the standard deviation is um...how far away from the top of the hill something is...right?

Answer 7

@MathMale

Answer 8

Yes, that's relevant, but not detailed enough. We need to talk in terms of numbers here.

Before we get into that, please share with me what you think "the top 6% of the population" means. Understanding that concept correctly is essential to solving this problem. What do you think we're looking for? How would you describe "the top 6% of the population"? How would you draw it?

Answer 9

I don't know. This is why I sought help...because my teacher did not explain it too well and neither does my book.

Answer 10

Please, @MathMale I need your help. I am better at fundraising for hungry kids. I really need assistance in this aspect of my growing/learning.

Answer 11

I'll help you with this problem, I promise. I'm temporarily distracted by working on another problem with someone else, but will be back!

Answer 12

Ok, @MathMale I will take my lunch right now. I will only be a few minutes an I will mention you again when I come back. and I cannot express my amount of gratitude for your help! :)

Answer 13

You are expected to define / show / figure "the top 6% of the population."

How? The concept of "normal distribution," along with the concepts of mean, standard deviation, z-score and perhaps one or two more, are very useful here.

First, let me draw a "standard normal curve." It's a bell-shaped curve that looks like this: