Statistics Chapter 6  Continuous Probability Distributions
Home > Flashcards > Print Preview
The flashcards below were created by user
honestkyle
on
FreezingBlue Flashcards. What would you like to do?

What does continuous mean?
The number of possible real numbers in any interval is infinite.

If a line represents an interval, and x can take on any real value along that line, then what?
x is continuous

If a line represents an interval, and x CAN'T take on any real value along that line, then what?
x is discrete

What is the probability that x is a specific value in a continuous distribution?
 1/
 It can't be calculated

Instead of calculating a specific value in a continuous probability distribution, what CAN we calculate?
 x is inside an interval

What does
represent?
The area under the curve

What does the area under the whole curve equal?
1

What are continuous probability distributions often referred to as?
probability density functions

Give some examples of where a normal probability distribution is used?
 Heights of people
 Scientific measurements
 Test scores
 Amount of rainfall

Abraham De Moivre is known for what?
 Derived the normal distribution
 Predicted the date of his own death

Carl F. Guass is known for what?
Applied the normal distribution while studying motion of planets and stars

What is the skewness of a normal probability distribution?
0

What is the highest point of a normal probability distribution?

In a normal probability distribution what does the standard deviation determine?
The spread

What is a normal distribution commonly referred to as?
Family of distributions


What is the total area under the curve equal to ?
1

What is the area under the curve on one side of the mean?
0.5

What probability of values have a standard deviation > 2 and < 2?
95.44%

What probability of values have a standard deviation > 1 and < 1?
68.26%

What probability of values have a standard deviation > 3 and < 3?
99.72%

What is the zscore a measure of?
The number of standard deviations x is from

What is the zscore equation?



