Question

The manager of a computer retails store is concerned that his suppliers have been giving him...

The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4 years and a standard deviation of 0.4 years. He then randomly selects records on 36 laptops sold in the past. Round the answers of following questions to 4 decimal places.

What is the distribution of X? X ~ N

What is the distribution of ¯x? ¯x ~ N

What is the probability that one randomly selected laptop is replaced more than 3.9 years?

What is the probability that one randomly selected laptop is replaced more than 3.9 years?

For part d), is the assumption of normal necessary? yes or no

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 manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.5 years and a standard deviation of 0.4 years. He then randomly selects records on 9 laptops sold in the past. Round the answers of following questions to 4 decimal places. a. What is the distribution of X?...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.5 years and a standard deviation of 0.5 years. He then randomly selects records on 36 laptops sold in the past. Round the answers of following questions to 4 decimal places. What is the distribution of X? X...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.6 years. He then randomly selects records on 36 laptops sold in the past. Round the answers of following questions to 4 decimal places. What is the distribution of XX? XX...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.9 years and a standard deviation of 0.4 years. He then randomly selects records on 53 laptops sold in the past and finds that the mean replacement time is 3.7 years. Assuming that the laptop replacement times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.4 years and a standard deviation of 0.4 years. He then randomly selects records on 45 laptops sold in the past and finds that the mean replacement time is 4.3 years. Assuming that the laptop replacement times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.8 years and a standard deviation of 0.4 years. He then randomly selects records on 50 laptops sold in the past and finds that the mean replacement time is 3.7 years. Assuming that the laptop replacement times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.8 years and a standard deviation of 0.6 years. He then randomly selects records on 36 laptops sold in the past and finds that the mean replacement time is 3.5 years. Assuming that the laptop replacement times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.6 years and a standard deviation of 0.5 years. He then randomly selects records on 50 laptops sold in the past and finds that the mean replacement time is 3.4 years. Assuming that the laptop replacement times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.6 years and a standard deviation of 0.6 years. He then randomly selects records on 51 laptops sold in the past and finds that the mean replacement time is 3.4 years. Assuming that the laptop replacment times have...
The manager of a computer retails store is concerned that his suppliers have been giving him...
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.2 years and a standard deviation of 0.5 years. He then randomly selects records on 50 laptops sold in the past and finds that the mean replacement time is 4.1 years. Assuming that the laptop replacement times have...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT