The mean and the standard deviation of the life time of a type of a solar...
The mean and the standard deviation of the life time of a type of a solar panel is assumed to be 2500 weeks and 200 weeks respectively. Assume that the life time of solar panels follows a normal distribution. At what length of life should the guarantee be set in order for 98 per cent of solar panels to be found satisfactory? (no decimal: round up to the next integer value)
Homework Answers
Add Answer to:
The mean and the standard deviation of the life time of a type
of a solar...
The average life of a certain type of small motor is 10 years with a standard...
The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces free all motors that fail while under guarantee. If she is willing to replace only 3% of the motors that fail, how long a guarantee should be offered? Assume that the lifetime of a motor follows a normal distribution.
O: le, the mean commute time to work was 33.5 minutes and the standard deviation was...
O: le, the mean commute time to work was 33.5 minutes and the standard deviation was 7.3 In a random sample of 8 peop minutes A 90% confidence interval using the to work, it was found that the population standard deviation is 9 6 minutes Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results t-distribution was calculated to be...
The average healing time of a certain type of incision is 192 hours, with standard deviation...
The average healing time of a certain type of incision is 192 hours, with standard deviation of 30 hours. What percentage of the people having this incision would heal in 7 days or less? Assume a normal distribution. Click the icon to view the area under the standard normal curve table. % of people having this incision should heal in 7 days or less. (Type an integer or decimal rounded to the nearest hundredth as needed.)
The life of an automobile battery is known to follow normal distribution with a mean of...
The life of an automobile battery is known to follow normal distribution with a mean of 2000 days and a standard deviation of 200 days. (a) Find the percentage of batteries which fail before 1500 days. (b) What should be the guarantee period to be specified by the manufacturer so that the manufacturer will encounter only 10 percent failures of the battery?
A certain type of refrigerator has a length of life that is approximately normally distributed with...
A certain type of refrigerator has a length of life that is approximately normally distributed with a mean of 4.8 years and a population standard deviation of 1.3 years. What period of time should the manufacturer give as a guarantee if it is willing to replace only 1% of the machines?
Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1)...
Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1) complete parts (a) through (d) below. Click here to view page 1 of the cumulative standardized normal distribution table, Click here to view page 2 of the cumulative standardized normal distribution table. a. What is the probability that Z is between 1.57 and 1.83? - The probability that Z is between 1.57 and 1.83 is (Round to four decimal places as needed.) particular train...
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information...
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) x = 33, n = 25, C = 6, confidence level = 90% Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table a. Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample...
The average life of a certain type of small motor is 10 years with a standard...
The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces free all motors that fail while under guarantee. If she is willing to replace 3% of the motors that fail, how long a guarantee (in years) should she offer? You may assume that the lives of the batteries are normally distributed. A properly labeled figure of the normal distribution curve and x and z values is required...
In a random sample of 8 people, the mean commute time to work was 33.5 minutes...
In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.4 minutes. A 98% confidence interval using thet-distribution was calculated to be (25.7,41.3). After researching commute times to work, it was found that the population standard deviation is 8.6 minutes. Find the margin of error and construct a 98% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the...
Part B A sample mean, sample size, population standard deviation, and confidence level are provided. Use...
Part B
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x=52, n = 13,0-6, confidence level = 99% Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. Use the one mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was...
O: le, the mean commute time to work was 33.5 minutes and the standard deviation was 7.3 In a random sample of 8 peop minutes A 90% confidence interval using the to work, it was found that the population standard deviation is 9 6 minutes Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results t-distribution was calculated to be...
The average healing time of a certain type of incision is 192 hours, with standard deviation of 30 hours. What percentage of the people having this incision would heal in 7 days or less? Assume a normal distribution. Click the icon to view the area under the standard normal curve table. % of people having this incision should heal in 7 days or less. (Type an integer or decimal rounded to the nearest hundredth as needed.)
The life of an automobile battery is known to follow normal distribution with a mean of 2000 days and a standard deviation of 200 days. (a) Find the percentage of batteries which fail before 1500 days. (b) What should be the guarantee period to be specified by the manufacturer so that the manufacturer will encounter only 10 percent failures of the battery?
Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1) complete parts (a) through (d) below. Click here to view page 1 of the cumulative standardized normal distribution table, Click here to view page 2 of the cumulative standardized normal distribution table. a. What is the probability that Z is between 1.57 and 1.83? - The probability that Z is between 1.57 and 1.83 is (Round to four decimal places as needed.) particular train...
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) x = 33, n = 25, C = 6, confidence level = 90% Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table a. Use the one-mean z-interval procedure to find a confidence interval for the mean of the population from which the sample...
Part B
A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x=52, n = 13,0-6, confidence level = 99% Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. Use the one mean z-interval procedure to find a confidence interval for the mean of the population from which the sample was...
Most questions answered within 3 hours.
-
The income statement for the month of June, 2014 of Happy Smiles
Enterprises contains the following...
asked 41 seconds ago -
1-Calculate the mass in grams of 2.55 moles of KCl
2- Calculate how many moles are...
asked 57 seconds ago -
1. Choose value for p between 0.20 and 0.80. It should have at
least two decimal...
asked 2 minutes ago -
QUESTIONS: 500 words for the question
In defining abnormality, the criteria of “deviance”, “distress”
and “dysfunction”...
asked 3 minutes ago -
A sample of n = 25 scores produces a t statistic of t =
-2.062. If...
asked 21 minutes ago -
Given the following, compute the after tax cost of debt: The par
value of the firms...
asked 15 minutes ago -
Coding in C. Please only use stdio.h (which would mean no malloc
or anything like that)...
asked 20 minutes ago -
Use the fundamental accounting equation to find the missing
amounts.
Scenario
Assets
Liabilities
Equity
1
$...
asked 18 minutes ago -
A population has a mean of 200 and a standard deviation of 60.
Suppose a sample...
asked 23 minutes ago -
A bicyclist starting at rest produces a constant angular
acceleration of 1.10 rad/s2 for wheels that...
asked 37 minutes ago -
The
half-life of a radioactive source is 14.0 minutes. How much time
must elapse before the...
asked 34 minutes ago -
Given P(Ec ) = 0.43, P(F) = 0.52, and P(EF) = 0.18.
Find P( E |...
asked 1 hour ago