PS_Unit 3_Finding Distribution Probabilities Using Desmos

What are the population mean and population standard deviation of a standard normal distribution?

• Mean = 0, Standard Deviation = 1

• Mean = 1, Standard Deviation = 0

• Mean = 0, Standard Deviation = 0

• Mean = 1, Standard Deviation = 1

To find the probability P(z > 0.4) for a standard normal distribution using Desmos, what values should be entered for the Min and Max in the 'Find Cumulative Probability (CDF)' section?

• Min: -∞, Max: 0.4

• Min: 0.4, Max: ∞

• Min: 0, Max: 0.4

• Min: 0.4, Max: 1

To find the probability P(z < -1.2) for a standard normal distribution using Desmos, what should be the Min and Max values in the 'Find Cumulative Probability (CDF)' section?

• Min: -1.2, Max: ∞

• Min: -∞, Max: -1.2

• Min: -1.2, Max: 0

• Min: 0, Max: -1.2

To find the probability P(-2.3 < z < 1.2) for a standard normal distribution using Desmos, what should be the Min and Max values in the 'Find Cumulative Probability (CDF)' section?

• Min: -2.3, Max: 1.2

• Min: 1.2, Max: -2.3

Why do we need to select the CDF option?

• To determine the mean of a random variable.

• So the graph will display the mean at the center.

• To get the sum of all of the areas.

• To visualize the data in a histogram.