Find the minimum sample size required to estimate a population
proportion with a margin of error equal to .04 and a confidence
level of 90%. A recent study resulted in a sample proportion of
.70. Also determine the minimum sample size if no prior study was
done.
find the sample size needed to give a margin of error
to estimate a proportion within plus minus 2% within 99% confidence
within 95% confidence within 90% confidence assume no prior
knowledge about the population proportion p
1.
a. What is the formula for standard error of a distribution of a
sample proportion (sampling distribution of proportions)?
b. A distribution of a sample proportion (sampling distribution
of proportions) is approximately normal if what 2 conditions are
met?
c. What is the formula for standard error that is used to
compute a confidence interval for a proportion?
d. What is the formula for standard error that is used to
compute a test statistic for a proportion in a...
Difference between Means, Sample size selection.
Explain Confidence Interval for a Mean, Total, Proportion,
Standard Deviation.
Methods of Selecting Random Samples.
In a short paragraph, distinguish between Sampling Error and the
Margin of Error. Explain what each represents and the relationship
between them. (3 points)
In a short paragraph, distinguish between a Point Estimate and
an Interval Estimate. Explain what each represents and the
relationship between them. (3 points)
TYPED ONLY PLEASE!!!!
Differentiating pooled variance and the estimated standard error of the difference in sample means For the independent-measures t test, which of the following describes the pooled variance (whose symbol is sp2 )? The difference between the standard deviations of the two samples The variance across all the data values when both samples are pooled together A weighted average of the two sample variances (weighted by the sample sizes) An estimate of the standard distance between the difference in sample means (M1 - M2) and the...
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 0.36 and n=125.
a. 90%
b. 95%
c. 98%
a. The margin of error for a confidence interval to estimate the
population proportion for the 90% confidence level is _
b. The margin of error for a confidence interval to estimate the
population proportion for the 95% confidence level is _
c. The margin of...