An ethanol railroad tariff is a fee charged for shipments of ethanol on public railroads. An agricultural association publishes tariff rates for railroad-car shipments of ethanol. Assuming that the standard deviation ofsuch tariff rates is $1100, determine the probability that the mean tariff rate of 400 randomly selected railroad-car shipments of ethanol will be within $120 of the mean tariff rate of all railroad-car shipments ofethanol. Interpret your answer in terms of sampling error.The probability is 78(Round to three decimal places as needed.)Interpret this probability in terms of the sampling error. Choose the correct answer below and fill in the answer box to complete your choice.There is about a 70 % chance that the sampling error made in estimating the variance of the tariff rate of all railroad-car shipments of ethanol will be at most $120.(Round to one decimal place as needed.) The standard deviation of the lengths of hospital stay on the intervention ward is 7.8 days. Complete parts (a) through (c) below.a. For the variable "length of hospital stay," determine the sampling distribution of the sample mean for samples of 66 patients.The standard deviation of the sample mean is o, = 9 days.(Round to four decimal places as needed.)b. The distribution of the length of hospital stay is right skewed. Does this invalidate your result in part (a)? Explain your answer.A. No, because the sample sizes are sufficiently large that x will be approximately normally distributed, regardless of the distribution of x.B. Yes, because the sample sizes are not sufficiently large that x will be approximately normally distributed, regardless of the distribution of x.C. No, because if x is normally distributed, then x must be normally distributed.D. Yes, because x is only normally distributed if x is normally distributed.c. Obtain the probability that the sampling error made in estimating the population mean length of stay by the mean length of stay of a sample of 66 patients will be at most 2 days.The probability is approximately 90.(Round to three decimal places as needed.)

## As per the guidelines only 1 out of 2 are being answered post the question again by specifying…

An ethanol railroad tariff is a fee charged for shipments of ethanol on public railroads. An agricultural association publishes tariff rates for railroad-car shipments of ethanol. Assuming that the standard deviation of such tariff rates is $1100, determine the probability that the mean tariff rate of 400 randomly selected railroad-car shipments of ethanol will be within $120 of the mean tariff rate of all railroad-car shipments of ethanol. Interpret your answer in terms of sampling error. The probability is 78. (Round to three decimal places as needed.) Interpret this probability in terms of the sampling error. Choose the correct answer below and fill in the answer box to complete your choice. There is about a 70 % chance that the sampling error made in estimating the variance of the tariff rate of all railroad-car shipments of ethanol will be at most $120. (Round to one decimal place as needed.)

An ethanol railroad tariff is a fee charged for shipments of ethanol on public railroads. An agricultural association publishes tariff rates for railroad-car shipments of ethanol. Assuming that the standard deviation of such tariff rates is $1100, determine the probability that the mean tariff rate of 400 randomly selected railroad-car shipments of ethanol will be within $120 of the mean tariff rate of all railroad-car shipments of ethanol. Interpret your answer in terms of sampling error. The probability is 78. (Round to three decimal places as needed.) Interpret this probability in terms of the sampling error. Choose the correct answer below and fill in the answer box to complete your choice. There is about a 70 % chance that the sampling error made in estimating the variance of the tariff rate of all railroad-car shipments of ethanol will be at most $120. (Round to one decimal place as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

PLS. Solve Quickly Applications Problems According to a Sallie Mae survey and credit bureau data, in 2008, college students carried an average of $3173 debt on their credit cards (USA TODAY, April 13, 2009). Suppose that cur- rent credit card debts for all college students have a normal distribution with a mean of $3173 and a standard deviation of $800. Find the probability that credit card debt for a randomly se- lected college student is between $2109 and $3605.
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 420 grams and a standard deviation of 24 grams. Find the weight that corresponds to each event. a. highest 20 percent b. middle 60 percent c. highest 80 percent d. lowest 15 percent
ANSWER ASAP FInd the following: mean, median, mode, variance, and standard deviation.
A person's blood pressure is monitored by taking 44 readings daily. The probability distribution of his reading had a mean of 129 and a standard deviation of 33 a. Each observation behaves as a random sample. Find the mean and the standard deviation of the sampling distribution of the sample mean for the four observations each day. b. Suppose that the probability distribution of his blood pressure reading is normal. What is the shape of the sampling distribution? c. Refer to (b). Find the probability that the sample mean exceeds 140.
5: Cal Poly has a vested interest in finding out the level to which its students are content with the various courses offered. They are curious to learn what proportion of students are pleased with the courses they are enrolled in at the moment. The provost believes that 27 % of Cal Poly students are pleased with the courses. A group was asked in front of the library if they were content with the various courses offered. Out of the 113 students asked, 31 students were content with the various courses offered
On average, accountants earn approximately an average of $6500 per year in the United States. Assume that the distribution for electricians’ yearly earnings is normally distributed and that the standard deviation is $8680. Given a sample of 64 electricians, what is the standard deviation for the sampling distribution of the sample mean? a. 1205 b. 8680 c. 6000 d. 1085
Estimate the most likely degree of correlation for the scatterplot Options: a. 0 b. .85 c. -.90 d. -.05
Recently, a random sample of 13–18 year olds was asked, "How much do you currently have in savings?" The data in the table represent the responses to the survey. Approximate the mean and standard deviation amount of savings. LOADING... Click the icon to view the frequency distribution for the amount of savings. Savings Frequency $0– $199 343 $200– $399 94 $400– $599 62 $600– $799 21 $800– $999 9 $1000– $1199 5 $1200– $1399 3 The sample mean amount of savings is $nothing. (Round to the nearest dollar as needed.) The sample standard deviation is $nothing. (Round to the nearest dollar as needed.)