CW for CS 7.3 - Continuous Random Variables

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

Tags

CCSS.HSS.ID.A.3

The normal curve is symmetrical about the mean.

• True
• False

What is the the total area under the standard normal distribution curve?

• 100

• 25

• .5

• 1

Tags

CCSS.HSS.ID.A.4

If 10 is added to every value in a set of data, what will happen to the value of the mean?

• it will increase by 10
• it will decrease by 10
• it will stay the same
• it will both increase and decrease

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

If 10 is added to every value in a set of data, what will happen to the value of the standard deviation?

• it will increase
• it will decrease
• it will stay the same
• it will both increase and decrease

Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above

• two below and two above

• two below and zero

• zero and two above

Tags

CCSS.HSS.ID.A.4

Between what two standard deviations of a normal distribution contain 95% of the data?

• one below and one above

• two below and two above

• two below and zero

• zero and two above

Between what two standard deviations of a normal distribution contain 99.7% of the data?

• one below and one above

• two below and two above

• three below and three above

• zero

1.  Which best describes the shaded part of this normal distribution graph?  

• All data that is one or higher.
• All data that is one or more standard deviations above the mean.
• All data that is between 1 and 3.
• All data that is above the mean.

Tags

CCSS.HSS.ID.A.4

In a normal distribution, the mean, median and mode are

• within 1 standard deviation

• very similar

• within 0.1%

• equal

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.ID.A.3