Question

Express the confidence interval 18.5 % < p < 26.7 % in the
form of ˆp ± ME.

% ±. %

Answer #1

Solution :

The confidence interval 18.5 % < p < 26.7 %

Point estimate = = (Lower confidence interval + Upper confidence interval ) / 2

Point estimate = = (0.185 + 0.267) / 2

Point estimate = = 0.226 = 22.6%

Margin of error = E = Upper confidence interval -

Margin of error = E = 0.267 - 0.226

Margin of error = E = 0.041 = 4.1%

± ME

= 22.6% ± 4.1%

Express the confidence interval 35.7% < p < 42.3% in the
form of ˆp ± ME
% ± %

Express the confidence interval 27.5% <p< 42.7% in the
form of ˆp±ME.
______% ± % _______

Express the confidence interval 73%<p<88%73%<p<88%
in the form of ˆp±ME

Express the confidence interval
70.8%<p<77.6%70.8%<p<77.6% in the form of
ˆp±MEp^±ME

Express the confidence interval (11.2%,29.2%)in the form of
ˆp±ME
___% ± ____%

Express the confidence interval
61.9%<p<76.9%61.9%<p<76.9% in the form of ˆp±E?
__________% ± _____________ %

Express the confidence interval (8.6%,21.4%)(8.6%,21.4%) in the
form of ˆp±MEp^±ME.
% ±± %

A) Express the confidence interval
66.4%<p<81.2%66.4%<p<81.2% in the form of
ˆp±Ep^±E.
_____% ± ± %_____
B) Express the confidence interval 0.69±0.0510.69±0.051 in open
interval form (i.e., (0.155,0.855)).
C) In a survery of 181 households, a Food Marketing Institute found
that 141 households spend more than $125 a week on groceries.
Please find the 98% confidence interval for the true proportion of
the households that spend more than $125 a week on groceries.
Enter your answer as an open-interval
(i.e., parentheses)...

Express the confidence interval (84.6,268.8) in the form of
¯x±ME.
Express the confidence interval 587.7<μ<814.5 in the form
of ¯x±ME.

QUESTION PART A: Express the confidence interval 23.1% <p<
30.9% 23.1% <p< 30.9% in the form of ˆp±ME.
_____% ±____ %
QUESTION PART B: A political candidate has asked you to conduct
a poll to determine what percentage of people support her.
If the candidate only wants a 10% margin of error at a 95%
confidence level, what size of sample is needed?
Give your answer in whole people.
QUESTION PART C: A political candidate has asked you to conduct...

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