Homework Answers
Add Answer to:
According to a sludy, it takes an average of 330 minutes for taxpayers lo prepare, copy,...
4. According to an IRS study, it takes a mean of 330 minutes for taxpayers to...
4. According to an IRS study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This distribution of times follows the normal distribution and the standard deviation is 80 minutes. A consumer watchdog agency selects a random sample of 40 taxpayers. a. What is the standard error of the mean in this example? b. What is the likelihood the sample mean is greater than 360 minutes?
According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, l...
According to the Internal Revenue Service, the average length of time for an individual to complete (keep records for, learn, prepare, copy, assemble, and send) IRS Form 1040 is 10.18 hours (without any attached schedules). The distribution is unknown. Let us assume that the standard deviation is two hours. Suppose we randomly sample 36 taxpayers. Part (a) In words, define the random variable X. the number of taxpayers sampled the length of time, in minutes, for an individual to complete...
The mean commute time for all commuting students of a university is 23 minutes with a...
The mean commute time for all commuting students of a university is 23 minutes with a population standard deviation of 4 minutes. A random sample of 63 driving times of commuters is taken. ̅ a) [2pts] Is the sampling distribution of the sample mean ? normal? Circle the number of i. ii. iii. iv. b) the best answer. Yes, because the sample size n is greater than 30. No, because the parent population of the data is not said to...
CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be 140...
CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be 140 seconds (2 minutes and 20 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows a normal distribution with a standard deviation of eleven seconds. Suppose that we select a sample of 12 cuts from various CDs sold by CRA CDs Inc. Use Appendix B.1 for...
The average playing time of compact discs in a large collection is 37 minutes, and the...
The average playing time of compact discs in a large collection is 37 minutes, and the standard deviation is 3 minutes. (a) What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from the mean? 1 standard deviation above the mean 1 standard deviation below the mean 2 standard deviations above the mean 2 standard deviations below the mean (b) Without assuming anything about the distribution of times,...
Please help with this question, but NOT with the standard distribution table. My professor uses **normalcdf** or som...
Please help with this question, but NOT with the
standard distribution table. My professor uses **normalcdf** or
some formula. NO STANDARD NORMAL DISTIVUTION TABLE please. I also
need step by step answer. Thank you
Homework: Distribution of Sample Means (Vveek 12, O. HW Score: 71.21 % , 7.83 of 11 pts 7 of 11 (9 complete) Score: 0.33 of 1 pt Question Help 8.1.25 The shape of the distribution of the Sme required to get an oil change at a...
Time spent using e-mail per session is normally distributed, with mu equals μ=9 minutes and sigma...
Time spent using e-mail per session is normally distributed, with mu equals μ=9 minutes and sigma equals σ=2 minutes. Assume that the time spent per session is normally distributed. Complete parts (a) through (d). a. If you select a random sample of 25 sessions, what is the probability that the sample mean is between 8.8 and 9.2 minutes? (Round to three decimal places as needed.) b. If you select a random sample of 25 sessions, what is the probability that...
We need to examine the difference in the average time it takes two different passenger trains...
We need to examine the difference in the average time it takes two different passenger trains to complete a certain route. The standard deviations of these populations are unknown, but they are assumed to be equal to each other. A sample of 41 routes that were run by American Railways had a mean of 76 minutes and standard deviation of 4.1 minutes. A sample of 32 routes that were run by Midwest Railways had a mean of 75.2 minutes and...
The national average SAT score (for verbal and math) is 1028. Suppose that nothing is known...
The national average SAT score (for verbal and math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. Round the final answer to four decimal places and intermediate z-value calculations to two decimal places Source: New York Times Almanac. Part 1 out of 2 If a random sample of 245 scores was selected, find the probability that the sample mean is greater than 1041. Assume that the sample is...
Q4) A national air traffic control system handled an average of 47,665 flights during 29 randomly...
Q4) A national air traffic control system handled an average of 47,665 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,208 flights per day. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the average number of flights per day handled by the system. The 99% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit...
The average playing time of compact discs in a large collection is 37 minutes, and the standard deviation is 3 minutes. (a) What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from the mean? 1 standard deviation above the mean 1 standard deviation below the mean 2 standard deviations above the mean 2 standard deviations below the mean (b) Without assuming anything about the distribution of times,...
Please help with this question, but NOT with the
standard distribution table. My professor uses **normalcdf** or
some formula. NO STANDARD NORMAL DISTIVUTION TABLE please. I also
need step by step answer. Thank you
Homework: Distribution of Sample Means (Vveek 12, O. HW Score: 71.21 % , 7.83 of 11 pts 7 of 11 (9 complete) Score: 0.33 of 1 pt Question Help 8.1.25 The shape of the distribution of the Sme required to get an oil change at a...
The national average SAT score (for verbal and math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. Round the final answer to four decimal places and intermediate z-value calculations to two decimal places Source: New York Times Almanac. Part 1 out of 2 If a random sample of 245 scores was selected, find the probability that the sample mean is greater than 1041. Assume that the sample is...
Most questions answered within 3 hours.
-
Humans have used horses for transportation for millions of
years. Therefore, they will use horses for...
asked 1 hour ago -
The following are the Jensen Corporation's unit costs of making
and selling an item at a...
asked 1 hour ago -
Does direct Medicare reimbursement of Advanced practice nurses
increase access to their services?
asked 2 hours ago -
List and explain why a company would choose to use a
published
compensation survey vs. creating...
asked 2 hours ago -
A discrete random variable X can take values from 1 to 10. Find
the variance of...
asked 2 hours ago -
The primary financial goal of a corporation is to maximize:
shareholders wealth.
earnings per share.
stock...
asked 3 hours ago -
determine whether the vectors u=(1,2,3,), v=(-2,1,0) and
w=(1,0,1) are linearly dependent or independent.
asked 3 hours ago -
python
Define a function called print_values which takes a dictionary
object as a parameter. The function...
asked 4 hours ago -
In Chapter 1 you created a program named Triangle in
which you displayed a seven-line triangle...
asked 4 hours ago -
Research question: What are the differences between separately
stated and non separately stated transactions in an...
asked 4 hours ago -
By using Arduino write a code that connects two LEDs to two
push-buttons. Each button controls...
asked 5 hours ago -
Bank of America has bonds that pay a coupon interest rate of 5.5
percent and mature...
asked 6 hours ago