Which of the following is the correct formula for the margin of error of a population...
Which of the following is the correct formula for the margin of error of a population mean where the population standard deviation is not known?
- EBP =z⋅√p'⋅q'n=z⋅p′⋅q′n
- t=¯x−μs√nt=x¯-μsn
- EBM =z⋅σ√n=z⋅σn
- EBM =t⋅s√n
Homework Answers
while calculating the formual for margin of error of a population mean where the population standard deviation is not known we need to use t distribution
So, required formula is as:
EBM =t⋅s√n
Add Answer to:
Which of the following is the correct formula for the margin of
error of a population...
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin...
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin of Error, E, for means is: E = 1.96*s/sqrt(n), where s is the sample standard deviation, n is the sample size. The “sqrt” stands for square root. The Margin of Error, E, for proportions is: E = 1.96*sqrt[p*(1-p)/n], where s is the sample standard deviation, n is the sample size, and p is the proportion. Use the Confidence Interval formula above, and the correct...
1. Confidence Intervals are about the individual measurements, NOT the mean. True False 2. Means have...
1. Confidence Intervals are about the individual measurements, NOT the mean. True False 2. Means have smaller standard deviations than individuals. True or False 3. Paired t-methods are the same as one-sample t-methods applied to the pairwise differences. True or False 4. Pooled t-tests are best when the variances are unequal. True or False 5. Standard error (σ) is an estimate of the population standard deviation(s). True or False 6. The Central Limit Theorem (CLT) tells us that the mean...
Which statement is false? The "plus four" method is used when estimating a population proportion to...
Which statement is false? The "plus four" method is used when estimating a population proportion to obtain a more accurate confidence interval. You can use Student's t distribution with both qualitative and quantitative data. The error bound for a population mean (EBM) is sometimes called the margin of error. When estimating a population mean, if the population standard deviation is unknown you should use Student's t distribution.
When a population is finite, the formula that determines the standard error of the mean o-...
When a population is finite, the formula that determines the standard error of the mean o- needs to be adjusted. If N is the size of the population and n is the size of the N -n N -n sample (where n 20.05N), then the standard error of the mean is 0-=- .. The expression H i s called the finite population correction factor. Use the V N -1 finite population correction factor to construct the confidence interval for the...
a. Assume that a sample is used to estimate a population proportion p. Find the margin...
a. Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 343 with 292 successes at a confidence level of 99.8%. M.E.= b. You measure 46 textbooks' weights and find they have a mean weight of 79 ounces. Assume the population standard deviation is 7.5 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Give your answers as...
Chapter 08, Section 8.2, Intelligent Tutoring Problem 011 For a data set obtained from a sample...
Chapter 08, Section 8.2, Intelligent Tutoring Problem 011 For a data set obtained from a sample of size n-81 with x-47.75, it is known that ?-5.6. (a) what is the point estimate of ?? (b) Find z score corresponding to a 95% confidence level, zo/2. Recall that (1-a)100%-95%. (c) Construct a 95% confidence interval for ?. (d) What is the margin of error in part (c)? Recall the following definitions from section 8.2-3 of the text. The confidence level is...
7.1 Practice Problems Use the order of operations to calculate the margin of error for each...
7.1 Practice Problems Use the order of operations to calculate the margin of error for each problem. Where requested, identify the variables. Show all of your work. 1. On a recent promotion exam, 34 candidates passed the exam out of a total of 77 candidates. At the 95% confidence level (za/2 = 1.96), calculate the margin of error for the proportion who passed. P = - = 0.442 Y n Q = 1 -.442 = 0.558 n = 77 E...
what is the margin of error and the confidence interval? Question Help In a random sample...
what is the margin of error and the confidence interval?
Question Help In a random sample of seven people, the mean driving distance to work was 24.7 miles and the standard deviation was 6.6 miles. Assuming the population is normally distributed and using the I-distribution, a 90% confidence interval for the population mean is (15.5, 33.9) (and the margin of error is 9.2). Through research, it has been found that the population standard deviation of driving distances to work is...
A population has a standard deviation σ of 23 units. (Give your answers correct to two...
A population has a standard deviation σ of 23 units. (Give your answers correct to two decimal places.) (a) Find the standard error for the mean if n = 24. (b) Find the standard error for the mean if n = 41. (c) Find the standard error for the mean if n = 77.
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only...
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only m=0.5 Example 1 (Review): Finding the 99 % confidence interval of the population mean • Let's say Joe measures the average cross section area of pvc piping to be 20 millimeters squared for a sample of 64.. Joe knows the population sample standard deviation to be 10 millimeter squares. Construct a 99% Confidence interval of the situation. • Since both the population standard deviation...
When a population is finite, the formula that determines the standard error of the mean o- needs to be adjusted. If N is the size of the population and n is the size of the N -n N -n sample (where n 20.05N), then the standard error of the mean is 0-=- .. The expression H i s called the finite population correction factor. Use the V N -1 finite population correction factor to construct the confidence interval for the...
Chapter 08, Section 8.2, Intelligent Tutoring Problem 011 For a data set obtained from a sample of size n-81 with x-47.75, it is known that ?-5.6. (a) what is the point estimate of ?? (b) Find z score corresponding to a 95% confidence level, zo/2. Recall that (1-a)100%-95%. (c) Construct a 95% confidence interval for ?. (d) What is the margin of error in part (c)? Recall the following definitions from section 8.2-3 of the text. The confidence level is...
7.1 Practice Problems Use the order of operations to calculate the margin of error for each problem. Where requested, identify the variables. Show all of your work. 1. On a recent promotion exam, 34 candidates passed the exam out of a total of 77 candidates. At the 95% confidence level (za/2 = 1.96), calculate the margin of error for the proportion who passed. P = - = 0.442 Y n Q = 1 -.442 = 0.558 n = 77 E...
what is the margin of error and the confidence interval?
Question Help In a random sample of seven people, the mean driving distance to work was 24.7 miles and the standard deviation was 6.6 miles. Assuming the population is normally distributed and using the I-distribution, a 90% confidence interval for the population mean is (15.5, 33.9) (and the margin of error is 9.2). Through research, it has been found that the population standard deviation of driving distances to work is...
• For Example 1, Calculate the Sample Size Reqiured for a margin of error of only m=0.5 Example 1 (Review): Finding the 99 % confidence interval of the population mean • Let's say Joe measures the average cross section area of pvc piping to be 20 millimeters squared for a sample of 64.. Joe knows the population sample standard deviation to be 10 millimeter squares. Construct a 99% Confidence interval of the situation. • Since both the population standard deviation...
Most questions answered within 3 hours.
-
Rod figures that it takes an average (mean) of =20 minutes with
a standard deviation of...
asked 14 minutes ago -
You have 5 ul of a pure (undiluted) culture at a concentration
of 3.6 x 106...
asked 18 minutes ago -
______ activity indicates the presence of an electron transport
chain.
1- gelatinase 2- oxidase 3- caseinase...
asked 21 minutes ago -
The molarity of a silver nitrate solution is 0.192 M. How many
grams of silver ions...
asked 34 minutes ago -
Which of the following solutes will produce a greater increase
in boiling point when it is...
asked 30 minutes ago -
true or false: Series connected electrical circuit is a voltage
divider, and voltage of each device...
asked 25 minutes ago -
A 100-W lightbulb has a resistance of about 12 Ω when cold (20
∘C) and 128...
asked 29 minutes ago -
For the asset shown in the following table, use the capital
asset pricing model to find...
asked 30 minutes ago -
If the impulse response of a circuit is a pulse y(t) = u(t) –
u(t-T), T...
asked 36 minutes ago -
Eukaryotic cells have __ which is similar to prokaryotes of
Archaea.
A Ester-linked membrane lipids
B...
asked 46 minutes ago -
true or false. If work is done on a system by it's
surroundings, its value is...
asked 50 minutes ago -
Rene Descartes establishes a dualist approach to the world.
Explain this dualism, and how it connects...
asked 56 minutes ago