Pregunta
What is the Z-value that corresponds to an
confidence interval?
Ask by Peterson Peterson. in the United States
Jan 24,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
The Z-value for a 78% confidence interval is 1.23.
Solución

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Como
Beyond the Answer
To find the Z-value corresponding to a
confidence interval, you first calculate the area in the tails. Since the total area under the normal curve is
, a
confidence level leaves
in the tails, or
in each tail. This requires looking up the
percentile (which is
) in the Z-table. The Z-value that corresponds roughly to
is
. So, the answer is
.
For a
confidence interval, utilizing the standard normal distribution is essential—making it more accessible than you might think! Most statistics textbooks or online resources will provide Z-tables or calculators for finding these values. If you’re ever unsure, don’t hesitate to consult these references for improved clarity and confidence in your stats game!

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