Question

Determine the sample size needed to construct a 90% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.5. Assume the standard deviation of the GPA for the student population is 3.0. The sample size needed is ?

Answer #1

**Answer:-**

**Given
That:-**

Determine the sample size needed to construct a 90% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.5.

**Assume the standard deviation of the GPA for the student
population is 3.0. The sample size needed is ?**

The sample size need to construct 90%

confidence internal to estimate average GAP margin of error equal to 0.5

Squaring on both sides

Determine the sample size needed to construct a 90% confidence
interval to estimate the average GPA for the student population at
a college with a margin of error equal to 0.4. Assume the standard
deviation of the GPA for the student population is 3.5

Determine the sample size n needed to construct a 90 %
confidence interval to estimate the population proportion when p
equals 0.39 and the margin of error equals 5 %.
n=___

Determine the sample size n needed to construct a 90?%
confidence interval to estimate the population mean when
? = 48 and the margin of error equals 8.
n =

Assume that you want to construct a 95% confidence interval
estimate of a population mean. Find an estimate of the sample size
needed to obtain the specified margin of error for the 95%
confidence interval. The sample standard deviation is given
below.
Margin of errors=$6,
standard deviation=$22
The required sample size is __

Construct a 90% confidence interval to estimate the population
proportion with a sample proportion equal to 0.50 and a sample size
equal to 150. What are the upper and lower limits?

1,) Construct a 90% confidence interval for the population
proportion if an obtained sample of size n = 150 has x = 30
2.) Construct a 95% confidence interval for the population mean
if an obtained sample of size n = 35 has a sample mean of 18.4 with
a sample standard deviation of 4.5.

(S 9.2) Recall that a confidence interval for the sample mean
can be calculated using the interval
x¯?tn?1?sn??????x¯+tn?1?sn???
Thus, the margin of error is
tn?1?sn???
We can recover the margin of error from an interval constructed
on the calculator using algebra.
Suppose a random sample of size 16 was taken from a normally
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calculated to be s = 6.3. We'll assume the sample mean is
10 for convenience.
a) Calculate the margin...

What sample size would be needed to construct a 95% confidence
interval with a 5% margin of error on any population
proportion?
Give a whole number answer. (Of course.)

Determine the margin of error for a confidence interval to
estimate the population proportion for the following confidence
levels with a sample proportion equal to 0.35 and n= 120
the margin of error for a confidence interval to estimate the
population portion for 90% confidence level is
the margin of error for a confidence interval to estimate the
population portion for 95% confidence level is
the margin of error for a confidence interval to estimate the
population portion for 97%...

A confidence
interval is desired for the true average sale volume. Assume that
the population standard deviation is known to be 3. How large a
random sample is needed to construct a 99% interval for the true
average sale volume with a margin of error equal to 1?

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