Question

Assume that the average time of a prototype endovascular stent is 19 months, and that 60%...

Assume that the average time of a prototype endovascular stent is 19 months, and that 60% of stents lasts 17 to 24 months, and that their age follows normal distribution. 1) Determine the standard deviation of the distribution. 2)What’s the probability that a particular stent will last less than 1 year?

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
The average time taken for the nearest Covid-19 ambulance team to convey a patient showing symptoms...
The average time taken for the nearest Covid-19 ambulance team to convey a patient showing symptoms to the nearest designated hospital follows the normal distribution about a mean of 60 seconds and a standard deviation of 8 seconds. If 200 patients were selected at random, how many of them could be taken to the hospital in i) Less than 50 seconds                                                             ii) More than 64 seconds           
A recent study of the lifetimes of smart phones found the average is 24.3 months. Assume...
A recent study of the lifetimes of smart phones found the average is 24.3 months. Assume the population standard deviation is 4.6 months. A simple random sample of 35 smartphones was selected a) Is it necessary to assume that the lifetimes of smartphones follow a Normal distribution? Briefly explain. b) What is the probability that the sample mean lifetime would be less than 23 months? c) What is the probability that the sample mean lifetime would be more than 22...
1. Assume the time a half hour soap opera has an average of 10.4 minutes of...
1. Assume the time a half hour soap opera has an average of 10.4 minutes of commercials. Assume the number of minutes of commercials follows a normal distribution with standard deviation of 2.3 minutes. a. Find the probability a half hour soap opera has between 10 and 11 minutes of commercials. [Give three decimal places] b. The lowest 10% of minutes of commercials is at most how long? (In other words: find the maximum minutes for the lowest 10% of...
Suppose that for a particular brand of light bulb, the lifetime (in months) of any randomly...
Suppose that for a particular brand of light bulb, the lifetime (in months) of any randomly selected bulb follows an exponential distribution, with parameter l = 0.12            a)    What are the mean and standard deviation for the average lifetime of the particular brand of light bulbs? What is the probability a single bulb will last greater than 9 months?            b)    If we randomly select 25 light bulbs of the particular brand, what are the mean and standard...
The average life of a battery is 60 hours. Further, the life of the battery follows...
The average life of a battery is 60 hours. Further, the life of the battery follows a normal distribution with standard deviation of 5 hours. As a quality control manager, your goal is to limit the production of defective products. Your company considers a defective battery to be one that lasts less than 50 hours. Out of a batch of 100 batteries, what is the expected number of defective batteries?
Energetic Co., a battery manufacturer, claims their battery lasts for 67.22 months with a standard deviation...
Energetic Co., a battery manufacturer, claims their battery lasts for 67.22 months with a standard deviation of 5.863 months. You randomly sample 35 of these batteries. Assuming the distribution for the battery lifetime is approximately normal, what is the probability the average lifetime is less than 66.14? Question 8 options: 1) 0.5731 2) 0.8621 3) 0.4269 4) 0.1379 5) 0.2223
The lifespan of my favorite candle follows a normal distribution with an average of 400 hours...
The lifespan of my favorite candle follows a normal distribution with an average of 400 hours and a standard deviation of 50. What is the probability that my candle lasts exactly 400 hours, no more no less? A 100% B 50% C 25% D 0%
Let X denotes lifetime of lamp brand with average of 25 months and the variance 400....
Let X denotes lifetime of lamp brand with average of 25 months and the variance 400. If we assume that the pattern of lamp lifetime follows normal distribution, calculate the below items: a) What is the probability that a lamp lasted less than 45 months? b) What is the probability that a student scored at least 45 months? c) What is the probability that a lamp worked within 1 standard deviation of the mean? d) If a lamp lifetime is...
Assume that the life of an engine follows a normal distribution with an average life of...
Assume that the life of an engine follows a normal distribution with an average life of 12 years and a standard deviation of 2 years. The manufacturer replaces without additional charge all the motors that fail during the warranty. a) What is the probability that an engine will fail after 14 years? b) What is the probability that the engine lasts between 4 to 13 years? c) A contractor buys 400 engines which is the probability that 70 or more...
Suppose the age that children learn to walk is normally distributed with mean 12 months and...
Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1 month. 7 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. What is the distribution of X ? X ~ N( , ) What is the distribution of ¯ x ? ¯ x ~ N( , ) What is the probability that one randomly selected person learned to walk when...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT