Question

Use the given information to find the minimum sample size required to estimate an unknown population mean μ.

13) Margin of error: $127, confidence level: 95%, σ = $58

Answer #1

**Solution-**

Use the given information to find the minimum sample size
required to estimate an unknown population mean μ.
How many students must be randomly selected to estimate the mean
weekly earnings of students at one college? We want 95% confidence
that the sample mean is within $5 of the population mean, and the
population standard deviation is known to be $60.

Use the given information to find the minimum sample size
required to estimate the population proportion.
Margin of error: 0.028; confidence level: 99%; p and q
unknown

Use the given information to find the minimum sample size
required to estimate an unknown population mean μ.
How many women must be randomly selected to estimate the mean
weight of women in one age group. We want 90% confidence that the
sample mean is within 2.0 lb of the population mean, and the
population standard deviation is known to be 27 lb.

Use the given data to find the minimum sample size required to
estimate the population proportion. Margin of error: 0.09;
confidence level: 99%; and unknown

Use the given data to find the minimum sample size required to
estimate the population proportion. Margin of error: 0.04;
confidence level: 85% ; ?̂ and ?̂ unknown.

Use the given information to find the minimum sample
size required to estimate an unknown population mean
.
How many commuters must be randomly selected to estimate the mean
driving time of Chicago commuters? We want 98% confidence that the
sample mean is within 3 minutes of the population mean, and the
population standard deviation is known to be 8 minutes.

Use the given data to find the minimum sample size required to
estimate a population proportion or percentage.
Margin of error: five percentage points; confidence level
95%; from a prior study, Modifying Above p with caret is
estimated by the decimal equivalent of 58%

Use the given data to find the minimum sample size required to
estimate the population proportion. Margin of error: 0.005;
confidence level: 96%; p and q unknown

Use the given data to find the minimum sample size required to
estimate the population proportion.
Margin of error. 0.018, confidence level: 99%; p and q
unknown.

Use the given information to find the minimum sample size
required to estimate an unknown population mean
muμ.
How many students must be randomly selected to estimate the mean
weekly earnings of students at one college? We want 95%
confidence that the sample mean is within
$22
of the population mean, and the population standard deviation
is known to be
$4343.
A.
1 comma 7761,776
B.
2 comma 5102,510
C.
1 comma 5651,565
D.
1 comma 251

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