Density Curves

Question 1

can be measured ex) weight of m&m’s

Answer 1

continuous

Question 2

numerical outcome of a probability that is determined by chance ex) roll of a die, or flipping a coin

Answer 2

random variable

Question 3

can be counted ex) number of red m&m’s in a bag

Answer 3

discrete

Question 4

What type of graph is this?

Answer 4

continuous density curve

Question 5

What type of graph is this?

Answer 5

discrete density curve

Question 6

68% of the observations fall within how many standard deviations of the mean?

Answer 6

1

Question 7

95% of the observations fall within how many standard deviations of the mean?

Answer 7

2

Question 8

99.7% of the observations fall within how many standard deviations of the mean?

Answer 8

3

Question 9

what is the area under any density curve?

Answer 9

1

Question 10

the area under the curve from negative infinity to a given point

Answer 10

a percentile

Question 11

what does it mean to be in the 80th percentile on the ACT?

Answer 11

the person scored higher than 80% of the people who took the ACT