Still Confused?

Try reviewing these fundamentals first.

- Home
- Higher 2 Maths
- Normal Distribution and Z-score

Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Intro Lesson10:20
- Lesson: 1a4:52
- Lesson: 1b5:27
- Lesson: 1c3:34
- Lesson: 2a2:31
- Lesson: 2b3:11
- Lesson: 2c4:58
- Lesson: 3a3:23
- Lesson: 3b4:02
- Lesson: 3c6:08

- Introduction

$\cdot$ Why are z-scores needed for random continuous variables?

$\cdot$ Relationship between area under the curve and probability

$\cdot$ Leads to Standard normal distribution

- 1.
**Reading the Z Table**

Use the Z table to find:a)the z-score when the area under the curve to the left of z is 0.3015.b)the area from the mean to a z-score of 1.45.c)the z-score when the area under the curve to the left of z is 0.7774. - 2.
**Finding Probabilities from Z-Scores**

Answer the following questions based on the properties of standard normal distribution.a)What is the probability of having a z-score that is less than 0.75?b)What is the probability of having a z-score that is greater than -1.83?c)What is the probability of having a z-score that is between -1.27 to 1.06? - 3.
**Finding Z-Scores from Areas**

Answer the following questions based on the properties of standard normal distribution.

i) by Z table

ii) by calculator

a)Find the z-score that represents the bottom 70%.b)Find the z-score that represent the top 70%.c)Find the z-scores that represent the top 4% and the bottom 4%.

We have over 700 practice questions in Higher 2 Maths for you to master.

Get Started Now