Question

For a confidence level of 98%, find the critical Z-value using the Standard normal Table.

Answer 1

Answer:

The critical z-value = 2.326

Step-by-step explanation:

The confidence Level, CL = 98% = 98/100

CL = 0.98

The significance Level is calculated as:

`\begin{gathered} \alpha=1-CL \\ \\ \alpha=1-0.98 \\ \\ \alpha=0.02 \end{gathered}`
`\begin{gathered} (\alpha)/(2)=(0.02)/(2) \\ (\alpha)/(2)=0.01 \end{gathered}`

From the standard normal table:

`z_(0.01)=2.326`

Therefore, the critical z-value = 2.326