Continuous Distributions

Find the probability the snowfall will be between 3 and 6 inches.

• .2

• .4

• .6

• 1

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees.  How many standard deviations from the mean would a temperature of 17 degrees be?  

• 1 
• 1.429
• -1.429
• 11.5

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees.  Approximately what percent of days in February will have days below 23 degrees?

• 5%

• 34%

• 50%

• 68%

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of days in February will be between 14.6 and 31.4 degrees?

• 68%

• 50%

• 99.7%

• 95%

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of the days in February would be between 24 and 30 degrees?

• 35.8%

• 68.2%

• 0%

• 50%

Find the area under the standard normal curve where z < 2.42 .

• .008

• .992

• .301

• .862

Which represents the number of standard deviations from the mean for the 85th percentile?

• 2.58

• -2.58

• -1.04

• 1.04

The weight of a newborn infant.

• Discrete

• Continuous

Find the area to the right of z= -1.02

• .846

• .782

• .154

• .523

The probability for a given range of a continuous random variable can be calculated by measuring the area underneath the density function in that range.

• true

• false