Question

In a recent poll, 500 people were asked if they liked baseball, and 57% said they did. Find the margin of error of this poll, at the 95% confidence level. As in the reading, in your calculations: --Use z = 1.645 for a 90% confidence interval --Use z = 2 for a 95% confidence interval --Use z = 2.576 for a 99% confidence interval. Give your answer rounded to three decimal places.

Answer #1

*given data
are:-*

sample size (n) = 500

sample proportion () = 57% = 0.57

z critical value for 95% confidence level is :-

[ mentioned in the problem ]

*the margin
of error of this poll,at the 95% confidence level
be:-*

*** if you have any doubt regarding the problem ,please write it
in the comment box...if satisfied,please
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In a recent poll, 600 people were asked if they liked soccer,
and 10% said they did. Based on this, construct a 90% confidence
interval for the true population proportion of people who like
soccer.
As in the reading, in your calculations:
--Use z = 1.645 for a 90% confidence interval
--Use z = 2 for a 95% confidence interval
--Use z = 2.576 for a 99% confidence interval.
Give your answers as decimals, to 4 decimal places.
[________, ________]

In a recent poll, 300 people were asked if they liked soccer,
and 37% said they did. Based on this, construct a 90% confidence
interval for the true population proportion of people who like
soccer.
As in the reading, in your calculations:
--Use z = 1.645 for a 90% confidence interval
--Use z = 2 for a 95% confidence interval
--Use z = 2.576 for a 99% confidence interval.
Give your answers as decimals, to 4 decimal places.
[,]

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