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- Statistics
- Normal Distribution and Z-score

Still Confused?

Try reviewing these fundamentals first

Still Confused?

Try reviewing these fundamentals first

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Start now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started Now- Intro Lesson5:47
- Lesson: 1a1:25
- Lesson: 1b6:23
- Lesson: 2a1:33
- Lesson: 2b4:00
- Lesson: 2c2:07
- Lesson: 2d3:57
- Lesson: 2e8:19
- Lesson: 3a2:07
- Lesson: 3b3:03
- Lesson: 3c1:15
- Lesson: 3d5:40
- Lesson: 3e6:08

- IntroductionWhat is sampling?
- 1.
**Understanding Proportions and Sample Size**

There are 7 supercars competing on a racetrack. The cars are labelled {1, 2, 3, 4, 5, 6, 7}.

Find,a)The proportion of odd numbered carsb)How many different samples are there if we chose samples of 3 cars

i. With replacement?

ii. Without replacement? - 2.
**Connecting Sample Proportions to Population Proportions**

Alice, Bob, Cole, Daisy, and Eve are all the students in a 10th grade class. Alice, Cole and Eve brought a lunch to class while the rest of the class did not.a)Find the proportion of students who brought a lunch to class.b)Make a list of all samples of students of size 2c)Find the probability of each sample occurring.d)What is the sample proportion of each sample?e)Find the average of all the sample proportions and explain the significance of your findings. - 3.
**Connecting Sample Means to the Population Mean**

Uncle Sammy grows prize winning big zucchinis. The weights of his four largest zucchinis are given in the table below:

Zucchini:

A

B

C

D

Weight:

7 lbs

9 lbs

11 lbs

5 lbs

a)What is the average weight of all the zucchinis Uncle Sammy grows?b)Make a list of all samples of size 2 for the zucchinis Uncle Sammy grows.c)What is the probability that each sample gets picked?d)What is the average weight of each sample?e)Find the average weight of all the sample means.