electricity bills in a certain city have mean 120.13. assume the bills are normally distributed with...
electricity bills in a certain city have mean 120.13. assume the bills are normally distributed with standard deviation 13.60. a sample of 54 bills was selected for an audit. find the 62 percentile for the sample mean. round to two decimal places.
Homework Answers
mean = 120.13
sd = 13.6
z-value from 62 percentile is 0.31
using central limit theorem,
x = mean + z * sigma/sqrt(n)
x = 120.13 + 0.31*13.6/sqrt(54)
x = 120.70
Add Answer to:
electricity bills in a certain city have mean 120.13. assume the
bills are normally distributed with...
Electricity bills in a certain city have mean $101.91. Assume the bills are normally distributed with...
Electricity bills in a certain city have mean $101.91. Assume the bills are normally distributed with standard deviation $19.65. A sample of 57 bills was selected for an audit. Find the 59 percentile for the sample mean. round to two decimal places
9) Electricity bills in a certain city have mean $104.88. Assume the bills are normally distributed...
9) Electricity bills in a certain city have mean $104.88. Assume the bills are normally distributed with standard deviation $12.40. A sample of 69 bills was selected for an audit. Find the 38 percentile for the sample mean. Round to two decimal places. 10) According to one survey, the mean serum cholesterol level for US adults was 197.4 with a standard deviation 51.9. A simple random sample of 96 adults is chosen. Find the 46 percentile for the sample mean....
Question 9 (1 point) Saved Electricity bills in a certain city have mean $ 123.76. Assume the bills are normal...
Question 9 (1 point) Saved Electricity bills in a certain city have mean $ 123.76. Assume the bills are normally distributed with standard deviation $ 18.20. A sample of 60 bills was selected for an audit. Find the 44 percentile for the sample mean. Write only a number as your answer. Round to two decimal places (for example: 42.81). Do not write any units. Your Answer: Answer
natural gas bills in a certain city have mean $77.47 assume the bills are normally distributed...
natural gas bills in a certain city have mean $77.47 assume the bills are normally distributed with standard deviation $12.96 find the value that seperates the lower 59% of the bills from the rest
Natural Gas bills in a certain city have mean $119.34. Assume the bills are normally distributed...
Natural Gas bills in a certain city have mean $119.34. Assume the bills are normally distributed with standard deviation $13.23. Find the value that separates the lower 34% of the bills from the rest
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
The monthly utility bills in a city are normally distributed, with a mean of $100 and...
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $15. Find the probability that a randomly selected utility bill is (a) less than $67, (b) between $87 and $120, and (c) more than $140. (Round to four decimal places as needed.)
The amounts of electricity bills for all households in a city have a skewed probability distribution...
The amounts of electricity bills for all households in a city have a skewed probability distribution with a mean of $145 and a standard deviation of $36. Find the probability that the mean amount of electric bills for a random sample of 75 households selected from this city will be between $137 and $150. Round your answer to four decimal places.
th+logical+th Electricity bills: According to a government energy agency, the mean monthly household electricity bill in...
th+logical+th Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.77. Assume the amounts are normally distributed with standard deviation $22.00. Use the TI-84 Plus calculator to answer the following (a) Find the 8th percentile of the bill amounts. (b) Find the 69th percentile of the bill amounts. (c) Find the median of the bill amounts. Round the answers to at least two decimal places Part 1 of...
The amounts of electricity bills for all households in a particular city have an approximately normal...
The amounts of electricity bills for all households in a particular city have an approximately normal distribution with a mean of $145 and a standard deviation of $28. Let ū be the mean amount of electricity bills for a random sample of 20 households selected from this city. Find the mean and standard deviation of X. Round your answers to the nearest integer, if required. Mj = $ll Gü = $ Comment on the shape of the sampling distribution of...
Question 9 (1 point) Saved Electricity bills in a certain city have mean $ 123.76. Assume the bills are normally distributed with standard deviation $ 18.20. A sample of 60 bills was selected for an audit. Find the 44 percentile for the sample mean. Write only a number as your answer. Round to two decimal places (for example: 42.81). Do not write any units. Your Answer: Answer
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
The amounts of electricity bills for all households in a city have a skewed probability distribution with a mean of $145 and a standard deviation of $36. Find the probability that the mean amount of electric bills for a random sample of 75 households selected from this city will be between $137 and $150. Round your answer to four decimal places.
th+logical+th Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.77. Assume the amounts are normally distributed with standard deviation $22.00. Use the TI-84 Plus calculator to answer the following (a) Find the 8th percentile of the bill amounts. (b) Find the 69th percentile of the bill amounts. (c) Find the median of the bill amounts. Round the answers to at least two decimal places Part 1 of...
The amounts of electricity bills for all households in a particular city have an approximately normal distribution with a mean of $145 and a standard deviation of $28. Let ū be the mean amount of electricity bills for a random sample of 20 households selected from this city. Find the mean and standard deviation of X. Round your answers to the nearest integer, if required. Mj = $ll Gü = $ Comment on the shape of the sampling distribution of...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago