Question
In: Statistics and Probability
How large a sample should be selected so that the maximum error of estimate for a...
How
large a sample should be selected so that the maximum error of
estimate for a 95% confidence interval for the population mean is
2.1 Assume the population standard deviation is 10.5.
Solutions
Expert Solution
The minimum sample is calculated if the distribution assumed as normal :
Where E= Maximum error and Z =Standard normal score at significance level which is 1.96 for 95% confidence interval calculated using the Z table shown below with illustration.
and 
=Population
standard deviation=10.5
The Z table is:
orchestra answered 1 year agoRelated Solutions
How large a sample should be selected so that the margin of error of estimate for...
How large a sample should be selected so that the margin of
error of estimate for a 98% confidence interval for p is .03 when
the value of the sample proportion obtained from a preliminary
sample is .75? n = 2013 n = 876 n = 1990 n = 1132
How large a sample n would we need to estimate p with a margin of error...
How large a sample n would we need to estimate p with a margin
of error of 0.05 with 95% confidence?
How large a sample should be selected to provide a 95% confidence interval with a margin...
How large a sample should be selected to provide a 95%
confidence interval with a margin of error of 6? Assume that the
population standard deviation is 40 . Round your answer to next
whole number.
1. How large of a sample is required if we want to estimate the mean price...
1. How large of a sample is required if we
want to estimate the mean price of a five year old Corvette within
+/- $500 with 90% confidence if the standard deviation is known to
be $3100.
2. Several factors are involved when
creating confidence intervals, such as sample size, the level of
confidence and margin of error. Which of the following statements
are true.
a. For a given sample size, reducing the
margin of error will mean lower confidence....
A researcher wishes to estimate the number of households with two computers. How large a sample...
A researcher wishes to estimate the number of households with
two computers. How large a sample is needed in order to be 98%
confident that the sample proportion will not differ from the true
proportion by more than 4%? A previous study indicates that the
proportion of households with two computers is 25%.
A researcher wishes to estimate the number of households with two computers. How large a sample...
A researcher wishes to estimate the number of households with
two computers. How large a sample is needed in order to be 99%
confident that the sample proportion will not differ from the true
proportion by more than 3%? A previous study indicates that the
proportion of households with two computers is 24%
Refer to the previous problem. How large a sample would be required to estimate the population...
Refer to the previous problem. How large a sample would be
required to estimate the population proportion to within .05 with
95 percent confidence (.30 is the best available estimate of p):
(a) If the finite population correction can be ignored? (b) If the
finite population correction is not ignored and N= 1500? Please
without Minitab or Rstudio, Step by step
Show that as the number of bootstrap samples B gets large, the oob error estimate for...
Show that as the number of bootstrap samples B gets large, the
oob error estimate for a random forest approaches its N-fold CV
error estimate, and that in the limit, the identity is exact.
(a) How large a sample must be drawn so that a 98% confidence interval for μ...
(a) How large a sample must be drawn so that a 98% confidence
interval for μ will have a margin of error equal to 3.8? Round the
critical value to no less than three decimal places. Round the
sample size up to the nearest integer.
A sample size of __?is needed to be drawn in order to obtain a
98% confidence interval with a margin of error equal to 3.8.
(b) If the required confidence level were 99.5%, would the...
Find the minimum sample size required to estimate a population proportion with a margin of error...
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.
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella Co.,...
- Parallel Arrays This question is in MindTap Cengage Summary In this lab, you use what you...
- 5. You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella...
- JAVA Write a test program that prompts the user to enter a series of integers and...
- (2) Cite an example on how organizations like Google, Facebook, Youtube etc collect data for image...
- The legal landscape is perpetually changing. Psychologists must remain abreast of these changes to avoid potentially...
- We are evaluating a project that costs $1.68 million, has a six-year life, and has no...
ADVERTISEMENT