HP Prime Graphing Wireless Calculator - Manual (Page 165)

Functions and commands 161
ConfZ1mean The one-sample Normal confidence interval for a mean.
Returns a list containing (in order):
• The lower critical Z-value
• The lower bound of the confidence interval
• The upper bound of the confidence interval
ConfZ1mean( ,n, σ
,
C)
Example:
ConfZ1mean(0.461368, 50, 0.2887, 0.95) returns {-
1.9599…, 0.3813…, 0.5413…}
ConfZ2mean The two-sample Normal confidence interval for the difference
of two means. Returns a list containing (in order):
• The lower critical Z-value
• The lower bound of the confidence interval
• The upper bound of the confidence interval
ConfZ2mean( , , n
1
, n
2
, σ
1
, σ
2
,C)
Example:
ConfZ2mean(0.461368, 0.522851, 50, 50, 0.2887,
0.2887, 0.95) returns {-1.9599…,
-0.1746…, 0.0516…)}
ConfZ1prop The one-sample Normal confidence interval for a proportion.
Returns a list containing (in order):
• The lower critical Z-value
• The lower bound of the confidence interval
• The upper bound of the confidence interval
ConfZ1prop(x,n,C)
Example:
ConfZ1prop(21, 50, 0.95)
returns
{-1.9599…,
0.2831…, 0.5568…}
x
x 1 x 2