Question

If n=28,
x¯(x-bar)=36,
and s=16, construct a confidence interval at a 95% confidence
level. Assume the data came from a normally distributed
population.

Give your answers to one decimal place.

__________ < μ < ________________

Give your answers to one decimal place.

__________ < μ < ________________

Answer #1

Sample mean =36

Sample standard deviation =16

Sample size =28

Level of significance=1-0.95=0.05

Degree of freedom =27

t critical value is (by using t table)=
2.052

If n=28,
x¯(x-bar)=36,
and s=16, construct a confidence interval at a 95% confidence
level. Assume the data came from a normally distributed
population.
Give your answers to one decimal place.
__________ <
μ
< ________________

If n=32, ¯xx¯(x-bar)=36, and s=5, construct a confidence
interval at a 90% confidence level. Assume the data came from a
normally distributed population.
Give your answers to one decimal place.
< μμ <

If n=13, ¯ x x¯ (x-bar)=50, and s=16, construct a confidence
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normally distributed population. Give your answers to one decimal
place.
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If n=20, ¯ x (x-bar)=44, and s=15, construct a confidence
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Give your answers to one decimal place.
____ < μμ < ____

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Give your answers to one decimal place.

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Give your answers to one decimal place.
_______< ? < ________

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