Question

Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.1...

Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.1 years. Suppose also that exactly 40% of the tubes die before 5 years. Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.

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

Homework Answers

Answer #1

Note:z value

NOTE: if you have any doubts please comment below

please rate positive

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
Problem Page Suppose that IQ scores in one region are normally distributed with a standard deviation...
Problem Page Suppose that IQ scores in one region are normally distributed with a standard deviation of 15 . Suppose also that exactly 60% of the individuals from this region have IQ scores of greater than 100 (and that 40% do not). What is the mean IQ score for this region? Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation...
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 21 AAA batteries produced by this manufacturer lasted a mean of 11 hours with a standard deviation of 1.7 hours. Find a 95% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then complete the table below. Carry your intermediate computations to at...
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation...
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 28 AAA batteries produced by this manufacturer lasted a mean of 9.1 hours with a standard deviation of 2.2 hours. Find a 95% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then complete the table below. Carry your intermediate computations to at...
Suppose that are creatine kinase levels among healthy males are normally distributed with a standard deviation...
Suppose that are creatine kinase levels among healthy males are normally distributed with a standard deviation of 22 units/L research shows that exactly 5% of the healthy males have a creatine kinase level above 151 units / L what is the mean creatine level in healthy males? carry your intermediate computations to at least four decimal places. round your answer to one decimal place.
estion Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard...
estion Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 17 AAA batteries produced by this manufacturer lasted a mean of 9.4 hours with a standard deviation of 2.2 hours. Find a 99% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then complete the table below. Carry your intermediate computations to...
Suppose that scores on a particular test are normally distributed with a mean of 110 and...
Suppose that scores on a particular test are normally distributed with a mean of 110 and a standard deviation of 19 . What is the minimum score needed to be in the top 15% of the scores on the test? Carry your intermediate computations to at least four decimal places, and round your answer to one decimal place.
Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean...
Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 60 miles/hour. The highway patrol's policy is to issue tickets for cars with speeds exceeding 80 miles/hour. The records show that exactly 5% of the speeds exceed this limit. Find the standard deviation of the speeds of cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Suppose that the heights of adult women in the United States are normally distributed with a...
Suppose that the heights of adult women in the United States are normally distributed with a mean of 64 inches and a standard deviation of 2.2 inches. Jennifer is taller than 80% of the population of U.S. women. How tall (in inches) is Jennifer? Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
A newspaper article reported that people spend a mean of 7.5 hours per day watching TV,...
A newspaper article reported that people spend a mean of 7.5 hours per day watching TV, with a standard deviation of 2.0 hours. A psychologist would like to conduct interviews with the 20% of the population who spend the most time watching TV. She assumes that the daily time people spend watching TV is normally distributed. At least how many hours of daily TV watching are necessary for a person to be eligible for the interview? Carry your intermediate computations...
A newspaper article reported that people spend a mean of 6.5 hours per day watching TV,...
A newspaper article reported that people spend a mean of 6.5 hours per day watching TV, with a standard deviation of 1.8 hours. A psychologist would like to conduct interviews with the 10% of the population who spend the most time watching TV. She assumes that the daily time people spend watching TV is normally distributed. At least how many hours of daily TV watching are necessary for a person to be eligible for the interview? Carry your intermediate computations...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT