# Normal Distribution

## 20 questions

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• 1. Multiple Choice
30 seconds
1 pt

434 Company pack coffee in bags marked as 250 g

A large number of packs of coffee were weighed and the mean and standard deviation were calculated as 255 g and 2.5 g respectively.

Assuming this data is normally distributed, what percentage of packs are underweight?

2.5%

3.5%

4%

5%

• 2. Multiple Choice
30 seconds
1 pt

Students pass a test if they score 50% or more.

The marks of a large number of students were sampled and the mean and standard deviation were calculated as 42% and 8% respectively.

Assuming this data is normally distributed, what percentage of students pass the test? in percentage...

5

16

24

32

• 3. Multiple Choice
2 minutes
1 pt

The ages of the population of people living in Meru area in Ipoh are Normally distributed with mean 43 and standard deviation 14

The town has a population of 5,000.

How many would you expect to be aged between 22 and 57?

You can use this Standard Normal Distribution curve:

1750

3860

3870

4330