A standard normal table, also called the unit normal table or Z table, may be a

opatovaL

opatovaL

Answered question

2021-09-18

A standard normal table, also called the unit normal table or Z table, may be a mathematical table for the values of ϕ, which are the values of the cumulative distribution function of the traditional distribution.
confidence intervalsZ901.645951.96962.05972.17982.326992.576
a) How do calculate Z-score using the confidence interval?

Answer & Explanation

Mayme

Mayme

Skilled2021-09-19Added 103 answers

Step 1
Calculation of z score of 95%
Cz=0.95
α=1Cz
=10.95
=0.05
Here confidence interval is given that mean 2 tailed test
Here: α=0.05
α2=0.052=0.025
P(x<z)=0.025
z=1.96 (\because z-table)
z=1.96
P(x>z)=0.025
z=1.96(ztable)
Therefore for 95% confidence interval you confind
zvalue=1.96
p(z<μ<z)=0.95
z=1.96

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