WorksheetsNormal Distribution Review
Total questions: 7
Worksheet time: 11mins
Name
Class
Date
1.
The z-score
z=(x-M)/SD
represents.....
a)
the amount of standard deviations a data value is above or below the mean.
b)
the percent the data value is above or below the mean.
2.
How is the graph distributed?
a)
Approximately Normal
b)
Skewed to the Left
c)
Skewed to the Right
d)
Uniform
3.
What is the area under the curve to the left of z = 0.55 ?
a)
.2912
b)
.5500
c)
.9394
d)
.7088
4.
If a distribution is approximately NORMAL , what percentage of data falls within 1 standard deviation?
a)
25%
b)
68%
c)
95%
d)
99.7%
5.
What is the mean on the graph given?
(a)
6.
What is the standard deviation on the graph given?
(a)
7.
The shelf life of a particular dairy product is approximately normally distributed with a mean of 12 days and a standard deviation of 3 days.
About what percent of the products last between 12 and 15 days?
a)
68%
b)
34%
c)
16%
d)
2.5%
100 %
