Homework Answers
1)
| standard deviation σ= | 1150 |
| sample size =n= | 500 |
| std error=σx̅=σ/√n= | 51.4296 |
| probability is =P((-90-0)/51.43)<Z<(90-0)/51.43)=P(-1.75<Z<1.75)=0.9599-0.0401=0.9198 |
2)
there is about 91.98 % chance that the sampling error made in estimating mean tarriff rate of all railroad,,,,,will be at most $90
Add Answer to:
please answer all questions & the questions from the drop
down menu
An ethanol railroad tariff...
An ethanol railroad tariff is a fee charged for shipments of ethanol on public railroads. An...
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 $1250, determine the probability that the mean tariff rate of 400 randomly selected railroad-car shipments of ethanol will be within $80 of the mean tariff rate of all railroad-car shipments of ethanol. Interpret your answer in terms of sampling error. The probability is (Round...
A random sample of n = 500 observations from a binomial population produced x = 220...
A random sample of n = 500 observations from a binomial population produced x = 220 successes. (a) Find a point estimate for p. Find the 95% margin of error for your estimator. (Round your answer to three decimal places.) (b) Find a 90% confidence interval for p. (Round your answers to three decimal places.) _____to_____ Interpret this interval. a. In repeated sampling, 10% of all intervals constructed in this manner will enclose the population proportion. b. In repeated sampling,...
Data on salaries in the public school system are published annually by a teachers' association. The...
Data on salaries in the public school system are published annually by a teachers' association. The mean annual salary of public) classroom teachers is 557.7 thousand. Assume a standard deviation of $8.4 thousand. Complete parts (a) through (e) below a. Determine the sampling distribution of the sample mean for samples of size 64. The mean of the sample mean is Hy = $(Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is =$(Type...
please answer all three questions. The monthly utility bills in a city are normally distributed, with...
please answer all three questions.
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16. Find the probability that a randomly selected utility bill is (a) less than $66, (b) between $81 and $90, and (c) more than $100. (a) The probability that a randomly selected utility bill is less than $66 is (Round to four decimal places as needed.)
The following data represents the rate of return of the stock exchange (x) and the rate...
The following data represents the rate of return of the stock exchange (x) and the rate of return of a certain stock (y). The equation of the least squares regression line is y0.9764x+0.5975 and the standard error of the estimate is 2.3518. Answer parts (a)-d). x 0.23094 1.403.86 325-253 1.89-1.91-2.01 3.00 0.90 y 1.21 -057-059 589590258 006 1.78 006 5.79 -157 (a) What is the mean rate of return for the stock if the rate of return of the S&P...
Drop down options are durability, impact properties, shock absorbing capabilities, the two independent variables. A regression...
Drop down options are durability, impact properties, shock
absorbing capabilities, the two independent variables.
A regression analysis is performed to predict the durability of a brand of running shoe, based on the shock-absorbing capability and the change in impact properties over time. The resulting ANOVA table is below. Complete parts (a) through (d). Degrees of Sum of Freedom Squares Regression Error Total 10.45577 6.46314 16.91891 Mean Square 5.22789 0.28101 p-value 0.00002 18.60 2 23 25 a. Determine whether there is...
In a random sample of ten people, the mean driving distance to work was 18.6 miles...
In a random sample of ten people, the mean driving distance to work was 18.6 miles and the standard deviation was 6.5 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean (Round to one decimal place as...
Please use the drop down menu of answer choices to answer all questions. Reference both picturea...
Please use the drop down menu of answer choices to answer all
questions. Reference both picturea for all possible answer choices.
Thanks!
1. At this step in the process of translation the ribosome assemble around the mRNA 2 At this step in translation the tRNA takes amino acids to the ribosomes attached to mRNA_to build a polypeptide chain 3. At this step in translation the ribosome releases the polypeptide chain 4. True/False in prokaryotes translation takes place in the cytoplasm...
can someone help me all these questions please. i kind if forgot step to step how...
can someone help me all these questions please. i kind if
forgot step to step how to solve this may someone help me solve
these questions.
Question Help Library An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of 139 lb and a standard deviation of 29.7 ib. a. If a pilot...
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...
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 $1250, determine the probability that the mean tariff rate of 400 randomly selected railroad-car shipments of ethanol will be within $80 of the mean tariff rate of all railroad-car shipments of ethanol. Interpret your answer in terms of sampling error. The probability is (Round...
Data on salaries in the public school system are published annually by a teachers' association. The mean annual salary of public) classroom teachers is 557.7 thousand. Assume a standard deviation of $8.4 thousand. Complete parts (a) through (e) below a. Determine the sampling distribution of the sample mean for samples of size 64. The mean of the sample mean is Hy = $(Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is =$(Type...
please answer all three questions.
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16. Find the probability that a randomly selected utility bill is (a) less than $66, (b) between $81 and $90, and (c) more than $100. (a) The probability that a randomly selected utility bill is less than $66 is (Round to four decimal places as needed.)
The following data represents the rate of return of the stock exchange (x) and the rate of return of a certain stock (y). The equation of the least squares regression line is y0.9764x+0.5975 and the standard error of the estimate is 2.3518. Answer parts (a)-d). x 0.23094 1.403.86 325-253 1.89-1.91-2.01 3.00 0.90 y 1.21 -057-059 589590258 006 1.78 006 5.79 -157 (a) What is the mean rate of return for the stock if the rate of return of the S&P...
Drop down options are durability, impact properties, shock
absorbing capabilities, the two independent variables.
A regression analysis is performed to predict the durability of a brand of running shoe, based on the shock-absorbing capability and the change in impact properties over time. The resulting ANOVA table is below. Complete parts (a) through (d). Degrees of Sum of Freedom Squares Regression Error Total 10.45577 6.46314 16.91891 Mean Square 5.22789 0.28101 p-value 0.00002 18.60 2 23 25 a. Determine whether there is...
In a random sample of ten people, the mean driving distance to work was 18.6 miles and the standard deviation was 6.5 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean . Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean (Round to one decimal place as...
Please use the drop down menu of answer choices to answer all
questions. Reference both picturea for all possible answer choices.
Thanks!
1. At this step in the process of translation the ribosome assemble around the mRNA 2 At this step in translation the tRNA takes amino acids to the ribosomes attached to mRNA_to build a polypeptide chain 3. At this step in translation the ribosome releases the polypeptide chain 4. True/False in prokaryotes translation takes place in the cytoplasm...
can someone help me all these questions please. i kind if
forgot step to step how to solve this may someone help me solve
these questions.
Question Help Library An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights with a mean of 139 lb and a standard deviation of 29.7 ib. a. If a pilot...
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...
Most questions answered within 3 hours.
-
A block is hung by a string from the inside roof of a van. When
the...
asked 1 minute ago -
Do you think companies should not go for long term debt in their
capital structure to...
asked 9 minutes ago -
I create an address book where the user enters the name, phone
and email in the...
asked 15 minutes ago -
The production capacity for acrylonitrile
(C3H3N) in the United States exceeds 2
million pounds per year....
asked 23 minutes ago -
explain and comment out your answer
43. How many address lines are required to address a...
asked 29 minutes ago -
A sample of 45 observations is selected from a normal
population. The sample mean is 49,...
asked 44 minutes ago -
A construction company is planning to bid on a building
contract. The bid costs the company...
asked 41 minutes ago -
A firm operating in a purely competitive environment is faced
with a market price of $250....
asked 48 minutes ago -
•Let’s say someone claims the average population size is
600 feet squared and the housing authority...
asked 55 minutes ago -
Cynaide is a deadly poison that blocks the last step in the
electron transport chain of...
asked 1 hour ago -
Your friend tells you that there is a vending machine on campus
that dispenses M&M packs...
asked 1 hour ago -
What advantages are there to using piperidine rather than
hydroxide as a base?
asked 1 hour ago