Exploring Normal Distribution in IB Mathematics

This video tutorial covers normal distribution questions as they appear in math exams, focusing on how to solve them using calculators. It explains the concept of normal distribution with an example involving tree heights, discusses basic and advanced probability questions, and demonstrates the use of normal CDF and inverse normal functions on calculators. The tutorial concludes by encouraging practice with these tools.

What does the Greek symbol 'mu' represent in normal distribution?

• Median

• Mean

• Standard deviation

• Variance

What shape is described when data is normally distributed?

• Exponential

• Linear

• Bell curve

• Scatter

In the context of normal distribution, what does the standard deviation indicate?

• The spread of the data

• The mean of the data

• The peak of the curve

• The total area under the curve

If the mean height of trees is 50 meters, what is the probability that a randomly selected tree is greater than 50 meters?

• 1.0

• 0.75

• 0.25

• 0.5

What does the total area under a normal distribution curve represent?

• The total probability

• The median of the data

• The mean of the data

• The variance of the data

How do you calculate the probability of a tree being taller than 60 meters using a calculator?

• Normal PDF

• Normal CDF

• Binomial distribution

• Poisson distribution

What is the probability that a tree is taller than 60 meters if the mean is 50 and standard deviation is 10?

• 0.159

• 0.841

• 0.5

• 0.3

What is the probability that a tree's height is between 30 and 45 meters?

• 0.2

• 0.4

• 0.3

• 0.1

What tool is used to find the height corresponding to a given probability in a normal distribution?

• Variance calculator

• Inverse normal

• Normal CDF

• Standard deviation calculator

If the area under the curve to the left of a certain value is 0.55, what does this imply about the data?

• 45% of the data is above this value

• 55% of the data is above this value

• 45% of the data is below this value

• 55% of the data is below this value