Question

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p∗=19%p∗=19%. You would like to be 99.5% confident
that your estimate is within 0.5% of the true population
proportion. How large of a sample size is required?

*n* =

Do not round mid-calculation. However, use a critical value accurate to three decimal places.

Answer #1

Solution :

Given that,

= 19%=0.19

1 - = 1 - 0.19 = 0.81

margin of error = E = 0.5% = 0.005

At 99.5% confidence level the z is ,

Z/2 = 2.807( Using z table )

Sample size = n = (Z/2 / E)2 * * (1 - )

= (2.807/ 0.005)2 * 0.19 * 0.81

= 48504.65

Sample size =48505

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p*=39%
. You would like to be 99.5% confident that you estimate is
within 2% of the true population proportion. How large of a sample
size is required?
n =
Do not round mid-calculation. However, use a critical value
accurate to three decimal places.

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p*=30%p*=30%. You would like to be 99.9% confident
that you estimate is within 5% of the true population proportion.
How large of a sample size is required?
n = ________________________
Do not round mid-calculation. However, use a critical value
accurate to three decimal places.

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p*=39%p*=39%. You would like to be 99% confident
that you estimate is within 2.5% of the true population proportion.
How large of a sample size is required?
n =
Do not round mid-calculation. However, use a critical value
accurate to three decimal places.

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p∗=23%p∗=23%. You would like to be 95% confident
that your estimate is within 3% of the true population proportion.
How large of a sample size is required?
n =
Do not round mid-calculation. However, use a critical value
accurate to three decimal places.

You want to obtain a sample to estimate a population proportion.
At this point in time, you have no reasonable estimate for the
population proportion. Your would like to be 99% confident that you
estimate is within 0.1% of the true population proportion. How
large of a sample size is required?
n =
Do not round mid-calculation. However, use a critical value
accurate to three decimal places
You want to obtain a sample to estimate a population proportion.
Based on...

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p ∗ = 12 % p∗=12% . You would like to be 99.5%
confident that your esimate is within 2% of the true population
proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately 16%. You would like to be 90% confident that your
estimate is within 3% of the true population proportion. How large
of a sample size is required? Do not round
mid-calculation.
n =

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately p = 19%. You would like to be 95% confident that
your esimate is within 5% of the true population proportion. How
large of a sample size is required?

You want to obtain a sample to estimate a population proportion.
Based on previous evidence, you believe the population proportion
is approximately ˆ p = 24 % . You would like to be 99% confident
that your esimate is within 0.5% of the true population proportion.
How large of a sample size is required? Show your work .

You want to obtain a sample to estimate a population mean. Based
on previous evidence, you believe the population standard deviation
is approximately σ = 44.3 . You would like to be 98% confident that
your estimate is within 1.5 of the true population mean. How large
of a sample size is required?
n =_______
Do not round mid-calculation. However, use a critical value
accurate to three decimal places — this is important for the system
to be able to...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 27 minutes ago

asked 37 minutes ago

asked 49 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago