Suppose that 60% of all tax returns lead to a refund. A random sample of a...
Suppose that 60% of all tax returns lead to a refund. A random sample of a 100 tax returns is taken.
a. What is the mean of the distribution of the sample proportion of returns leading to refunds?
b. What is the variance of the sample proportion?
c. What is the standard error of the sample proportion?
d. What is the probability that the sample proportion exceeds
0.65?
a. The mean of the distribution of the sample proportion is =
(Round to two decimal places as needed.)
b. The variance of the sample proportion is =
(Round to six decimal places as needed.)
c. The standard error of the sample proportion is =
(Round to four decimal places as needed.)
d. The probability that the sample proportion exceeds 0.65
(Round to four decimal places as needed
Homework Answers
Add Answer to:
Suppose that 60% of all tax returns lead to a refund. A random
sample of a...
Please help! Suppose that 60% of all tax returns lead to a refund. A random sample...
Please help!
Suppose that 60% of all tax returns lead to a refund. A random sample of 100 tax returns is taken a. What is the mean of the distribution of the sample proportion of returns leading to refunds? b. What is the variance of the sample proportion? c. What is the standard error of the sample proportion? d. What is the probability that the sample proportion exceeds 0.65? Click the icon to view the standard normal table. a. The...
In a population, 68% of all tax returns lead to a refund. A random sample of...
In a population, 68% of all tax returns lead to a refund. A random sample of 1000 tax returns is taken. (a) Describe the distribution of the number of returns leading to refunds in the sample. (b) What is the expected number of returns leading to refunds in the sample? What is its variance? (c) What is the mean of the sample proportion of returns leading to refunds? (d) What is the variance of the sample proportion? (e) What is...
Individuals filing federal income tax returns prior to March 31 received an average refund of $2763...
Individuals filing federal income tax returns prior to March 31 received an average refund of $2763 Consider the population of “last-minute” filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15). A researcher suggests that a reason individuals wait until the last five days is that,, on avaerage, these individuals receive lower refunds than do early filers. For a sample of 60 individuals who filed a tax return...
A random sample of size n = 60 is selected from a binomial distribution with population...
A random sample of size n = 60 is selected from a binomial distribution with population proportion p = 0.25. (a) What will be the approximate shape of the sampling distribution of p? O skewed to the right O skewed to the left O normal (b) What will be the mean and standard deviation (or standard error) of the sampling distribution of p? (Round your answers to four decimal places.) C standard deviation mean (c) Find the probability that the...
According to the Internal Revenue Service, the mean tax refund for the year 2014 was $2,800....
According to the Internal Revenue Service, the mean tax refund for the year 2014 was $2,800. Assume the standard deviation is $450 and that the amounts refunded follow a normal probability distribution a. What percent of the refunds are more than $3,100? (Round the Intermediate values to 2 decimal places. Round your answer to 2 decimal places.) * Answer is complete but not entirely correct. Percent 24.14% b. What percent of the refunds are more than $3,100 but less than...
Suppose a simple random sample of size n=200 is obtained from a population whose size is...
Suppose a simple random sample of size n=200 is obtained from a population whose size is N = 30,000 and whose population proportion with a specified characteristic is p=0.4. Complete parts (a) through (c) below. Click Here for StatCrunch (a) Describe the sampling distribution of P. Determine the mean of the sampling distribution of . Hq (Round to one decimal place as needed.) Determine the standard deviation of the sampling distribution of p. 0.- (Round to six decimal places as...
please complete (b) Question Help Suppose a simple random sample of size n = 125 is...
please complete (b)
Question Help Suppose a simple random sample of size n = 125 is obtained from a population whose size is N25,000 and whose population proportion with a specified characteristicip. 02. Complete parts (a) through (c) below. WWW Determine the mean of the sampling distribution of 02 (Round to one decimal place as needed) Determine the standard deviation of the sampling distribution of 0.0035777 (Round to six decimal places as needed) (1) What is the probability of obtaining...
The answers are in red. Please break it all down for me. I would really appreciate...
The answers are in red. Please
break it all down for me. I would really appreciate it!
The average income tax refund for the 2009 tax year was $3007. Assume the refund per person follows the normal probability distribution with a standard deviation of $965. Complete parts a through d below. a. What is the probability that a randomly selected tax return refund will be more than $2000? 0.8508 (Round to four decimal places as needed.) b. What is the...
Suppose a simple random sample of size n= 200 is obtained from a population whose size...
Suppose a simple random sample of size n= 200 is obtained from a population whose size is N = 20,000 and whose population proportion with a specified characteristic is p = 0.8. Complete parts (a) through (c) below. D. Not normal because ns0.05N and np(1 - p) < 10. Determine the mean of the sampling distribution of p. un = 0.8 (Round to one decimal place as needed.) p Determine the standard deviation of the sampling distribution of p. on...
Suppose a simple random sample of size n=200 is obtained from a population whose size is...
Suppose a simple random sample of size n=200 is obtained from a population whose size is N = 30,000 and whose population proportion with a specified Charadelei isp.06. Complete purt (a) through k) below O C. Not normal because no.05N and np(1-P) 10 OD. Approximately normal because 0.05N and np{1 - p)<10 P Determine the mean of the sampling distribution of 06 (Round to one decimal place as noeded) Determine the standard deviation of the sampling distribution of 0.0.034541 (Round...
Please help!
Suppose that 60% of all tax returns lead to a refund. A random sample of 100 tax returns is taken a. What is the mean of the distribution of the sample proportion of returns leading to refunds? b. What is the variance of the sample proportion? c. What is the standard error of the sample proportion? d. What is the probability that the sample proportion exceeds 0.65? Click the icon to view the standard normal table. a. The...
A random sample of size n = 60 is selected from a binomial distribution with population proportion p = 0.25. (a) What will be the approximate shape of the sampling distribution of p? O skewed to the right O skewed to the left O normal (b) What will be the mean and standard deviation (or standard error) of the sampling distribution of p? (Round your answers to four decimal places.) C standard deviation mean (c) Find the probability that the...
According to the Internal Revenue Service, the mean tax refund for the year 2014 was $2,800. Assume the standard deviation is $450 and that the amounts refunded follow a normal probability distribution a. What percent of the refunds are more than $3,100? (Round the Intermediate values to 2 decimal places. Round your answer to 2 decimal places.) * Answer is complete but not entirely correct. Percent 24.14% b. What percent of the refunds are more than $3,100 but less than...
Suppose a simple random sample of size n=200 is obtained from a population whose size is N = 30,000 and whose population proportion with a specified characteristic is p=0.4. Complete parts (a) through (c) below. Click Here for StatCrunch (a) Describe the sampling distribution of P. Determine the mean of the sampling distribution of . Hq (Round to one decimal place as needed.) Determine the standard deviation of the sampling distribution of p. 0.- (Round to six decimal places as...
please complete (b)
Question Help Suppose a simple random sample of size n = 125 is obtained from a population whose size is N25,000 and whose population proportion with a specified characteristicip. 02. Complete parts (a) through (c) below. WWW Determine the mean of the sampling distribution of 02 (Round to one decimal place as needed) Determine the standard deviation of the sampling distribution of 0.0035777 (Round to six decimal places as needed) (1) What is the probability of obtaining...
The answers are in red. Please
break it all down for me. I would really appreciate it!
The average income tax refund for the 2009 tax year was $3007. Assume the refund per person follows the normal probability distribution with a standard deviation of $965. Complete parts a through d below. a. What is the probability that a randomly selected tax return refund will be more than $2000? 0.8508 (Round to four decimal places as needed.) b. What is the...
Suppose a simple random sample of size n= 200 is obtained from a population whose size is N = 20,000 and whose population proportion with a specified characteristic is p = 0.8. Complete parts (a) through (c) below. D. Not normal because ns0.05N and np(1 - p) < 10. Determine the mean of the sampling distribution of p. un = 0.8 (Round to one decimal place as needed.) p Determine the standard deviation of the sampling distribution of p. on...
Suppose a simple random sample of size n=200 is obtained from a population whose size is N = 30,000 and whose population proportion with a specified Charadelei isp.06. Complete purt (a) through k) below O C. Not normal because no.05N and np(1-P) 10 OD. Approximately normal because 0.05N and np{1 - p)<10 P Determine the mean of the sampling distribution of 06 (Round to one decimal place as noeded) Determine the standard deviation of the sampling distribution of 0.0.034541 (Round...
Most questions answered within 3 hours.
-
For the following reaction, 0.128 moles of
potassium hydrogen sulfateare mixed with
0.504 moles of potassium...
asked 1 minute ago -
1. What is the present value of $400, three years in the future
if the interest...
asked 34 minutes ago -
The labor force minus the number of employed equals the number
of unemployed.
a. True
b....
asked 2 hours ago -
Determine the mass in units of grams [g] of 0.49 moles [mol]
of a new fictitious...
asked 3 hours ago -
A horizontal mass of M=5kg is on a spring and stretched to
x=0.5m when released from...
asked 4 hours ago -
26 of 50
"I have worked at the Arizona Humane Society for ten years, and
have...
asked 4 hours ago -
Compare and contrast zero based budgeting and incremental (or
base year) budgeting.
asked 4 hours ago -
4 pts 10. Which of the following hypothesis would be MOST
difficult to test experimentally? Group...
asked 4 hours ago -
A business owner makes 1,000 items a day. Each day he or she
contributes eight hours...
asked 4 hours ago -
A
circular loop in the plane of a paper lies inca0.65 T magnetic
field pointing into...
asked 4 hours ago -
A business owner is trying to decide whether to buy, rent, or
lease office space and...
asked 5 hours ago -
Thermal Storage Solar heating of a house is much more efficient
if there is a way...
asked 5 hours ago