How many samples are needed to estimate a population mean? The required confidence level is 99%...
How many samples are needed to estimate a population mean? The required confidence level is 99% and margin of error is 0.5. Population standard deviation, σ, is given as 3.0. Based on this information, how many samples (n) are needed?
Homework Answers
Solution :
Given that,
standard deviation = 
= 3.0
margin of error = E = 0.5
Z
/2
= 2.576
Sample size = n = ((Z/2
*
) / E)2
= ((2.576 * 3.0) / 0.5)2
= 239
Sample size = 239
Add Answer to:
How many samples are needed to estimate a population
mean? The required confidence level is 99%...
Determine the sample size n needed to construct a 99% confidence interval to estimate the population...
Determine the sample size n needed to construct a 99% confidence interval to estimate the population mean when σ=33 and the margin of error equal 5 n=?
Determine the sample size n needed to construct a 99% confidence interval to estimate the population...
Determine the sample size n needed to construct a 99% confidence interval to estimate the population mean when σ=87 and the margin of error equals 12. n =___(Round up to the nearest integer.)
How many samples must be collected to construct a 90% confidence interval for the mean number...
How many samples must be collected to construct a 90% confidence interval for the mean number of hours students spent watching Netflix during the first two weeks of the quarantine? The researcher has specified a margin of error = 0.5 year. Assume the population standard deviation, σ = 3.7 hours. SHOW ALL WORK
Determine the sample size needed to construct a 99% confidence interval to estimate the average GPA...
Determine the sample size needed to construct a 99% 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 3.0. The sample size needed is (Round up to the nearest integer.)
Construct a 99% confidence interval to estimate the population mean using the following date: x̅=45, σ=30,...
Construct a 99% confidence interval to estimate the population mean using the following date: x̅=45, σ=30, n=45(show work) Margin of error= ________ Confidence interveal =________
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
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 error =$5,standard deviation=$25 The required sample size is ????? (Round up to the nearest whole number as needed.)
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
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 error equals$5, standard deviation equals$19 The required sample size is __.
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
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 error equals=$66, standard deviation equals=$2222 The required sample size is _____. (Round up to the nearest whole number as needed.)
Determine the sample size n needed to construct a 99% confidence interval to estimate the population...
Determine the sample size n needed to construct a 99% confidence interval to estimate the population mean for the following margins of error when σ=77. a) 5 b) 8 c) 10 a)n= (Round up to the nearest integer.) b)n= (Round up to the nearest integer.) c)n= (Round up to the nearest integer.)
Assume that a sample is used to estimate a population mean μ. Use the given confidence...
Assume that a sample is used to estimate a population mean μ. Use the given confidence level and sample data to find the margin of error. Assume that the sample is a simple random sample and the population has a normal distribution. Round your answer to one more decimal place than the sample standard deviation. 99% confidence; n = 201; x=276; s = 75 answer options 13.8 12.4 16.0 10.5
Determine the sample size needed to construct a 99% 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 3.0. The sample size needed is (Round up to the nearest integer.)
Most questions answered within 3 hours.
-
4.14D Select a diameter of a steel driveshaft
that transmits 250 hp at 5000 rpm. Bending...
asked 34 seconds ago -
1 4 7 10
2 5 8 11
3 6 9 12
I want to print...
asked 21 seconds from now -
In a statistics class there are 12 students. Five of the
students are seniors and the...
asked 2 minutes ago -
Preparation of Cyclohexene From
Cyclohexanol
organic chemistry
What is the function of each of the following...
asked 23 minutes ago -
***EDIT: This was all the data that was provided.
Please show all work and formulas used!...
asked 26 minutes ago -
Assume that when adults with smartphones are randomly selected,
48% use them in meetings or classes....
asked 49 minutes ago -
A motor spins up from rest to an angular velocity of 165 rad/s
in 1.2 s....
asked 41 minutes ago -
An entomologist sprayed 120 adult Melon flies with a specific
low concentration of malathion and observed...
asked 45 minutes ago -
Suppose that a police car is moving to the right at 27.9 m/s,
while a speeder...
asked 48 minutes ago -
An electric dipole consists of charges +2e and -2e separated by
0.85 nm. It is in...
asked 50 minutes ago -
How many mL of 0.250 M BaCl2 would you need to precipitate all
the sulfate ion...
asked 1 hour ago -
Calculate the activity of a pure 5.8-μg sample of 3215P
(T12=1.23×106s).
asked 1 hour ago