Question

Consumer Reports indicated that the average life of a refrigerator before replacement is 14 years with...

Consumer Reports indicated that the average life of a refrigerator before replacement is 14 years with a (95% of data) range from 9 to 19 years. Let x = age at which a refrigerator is replaced. Assume that x has a distribution that is approximately normal.
a. Find a good approximation for the standard deviation of x values.
b. What is the probability that someone will keep a refrigerator fewer than 11 years before replacement?
c. What is the probability that someone will keep a refrigerator more than 18 years before replacement?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consumer Reports indicated that the average life of a refridgerator before replacement is mean= 14 years...
Consumer Reports indicated that the average life of a refridgerator before replacement is mean= 14 years with a (95% of data) range from 9 to 19 years. Let x= age at which refrigerator is replaced. Assume that x has a distribution that is approximately normal. a) Find a good approximation for the standard deviation of x values. b) What is the probability that someone will keep a refrigerator fewer than 11 years before replacement? c) What is the probability that...
Suppose, household color TVs are replaced at an average age of μ = 9.0 years after...
Suppose, household color TVs are replaced at an average age of μ = 9.0 years after purchase, and the (95% of data) range was from 6.4 to 11.6 years. Thus, the range was 11.6 − 6.4 = 5.2 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal. (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data...
Suppose, household color TVs are replaced at an average age of μ = 7.8 years after...
Suppose, household color TVs are replaced at an average age of μ = 7.8 years after purchase, and the (95% of data) range was from 5.4 to 10.2 years. Thus, the range was 10.2 − 5.4 = 4.8 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal. (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data...
Suppose, household color TVs are replaced at an average age of μ = 8.6 years after...
Suppose, household color TVs are replaced at an average age of μ = 8.6 years after purchase, and the (95% of data) range was from 6.0 to 11.2 years. Thus, the range was 11.2 – 6.0 = 5.2 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal. (a) The empirical rule indicates that for a symmetrical and bell-shaped distribution, approximately 95% of the data...
Suppose, household color TVs are replaced at an average age of μ = 7.4 years after...
Suppose, household color TVs are replaced at an average age of μ = 7.4 years after purchase, and the (95% of data) range was from 5.0 to 9.8 years. Thus, the range was 9.8 − 5.0 = 4.8 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal. (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data...
Suppose, household color TVs are replaced at an average age of μ = 8.2 years after...
Suppose, household color TVs are replaced at an average age of μ = 8.2 years after purchase, and the (95% of data) range was from 4.2 to 12.2 years. Thus, the range was 12.2 − 4.2 = 8.0 years. Let x be the age (in years) at which a color TV is replaced. Assume that x has a distribution that is approximately normal. (a) The empirical rule indicates that for a symmetric and bell-shaped distribution, approximately 95% of the data...
A recent report stated that Canadian life expectancy, on average, is 80.7 years —— better than...
A recent report stated that Canadian life expectancy, on average, is 80.7 years —— better than in the United States ( 78.1 years) but not as good as Japan (82.7 year). Assumme that Canadian life expectancies are approximately normal, wih a standard deviation of 9.3 years. A random sample of 35 death certificates drawn from a national Canadian vital statistics database indicated a mean age at death of 79.5 years. (a) (1 point) Find the best point estimate (b) (3...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 45.4 months and a standard deviation of 7.7 months. (a) If Quick Start guarantees a full refund on any battery that fails within the 36-month period after purchase, what percentage of its batteries will the company expect to replace? (Round your answer to two decimal places.) % (b)...
According to a consumer survey of young adults​ (18-24 years of​ age) who shop​ online, 23​%...
According to a consumer survey of young adults​ (18-24 years of​ age) who shop​ online, 23​% own a mobile phone with internet access. In a random sample of 300 young adults who shop​ online, let x be the number who own a mobile phone with internet access. a. Explain why x is a binomial random variable​ (to a reasonable degree of​ approximation). Choose the correct explanation below. A. The experiment consists of n​ identical, dependent​ trials, with more than two...
1. A random number generator is used to select a number from 1 to 500 ?(inclusively)....
1. A random number generator is used to select a number from 1 to 500 ?(inclusively). What is the probability of selecting the number 595 ? What is the probability? 2.Identify the sample space of the probability experiment and determine the number of outcomes in the sample space. -Randomly choosing an even number between 10 and 20, inclusive The sample space is? (Use a comma to separate answers) There are _____ outcomes in the sample space 3. Determine the number...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT