ZuoTi.Pro
Question

The average age of cars owned by residents of a small city is 6 years with...

The average age of cars owned by residents of a small city is 6 years with a standard deviation of 2.2 years.  A simple random sample of 400 cars is to be selected, and the sample mean age  of these cars is to be computed.  What is the probability that the average age  of the 400 cars is more than 6.1 years? Show all main steps of your calculation. (No points will be given to an answer of only a final number provided even if the number is correct.)

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
The average age of cars owned by residents of a small city is 6 years with...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • The average age of cars owned by residents of a small city is 6 years with...

    The average age of cars owned by residents of a small city is 6 years with a standard deviation of 2.2 years but the distribution is quite skewed. A simple random sample of 400 cars is to be selected, and the sample mean age x bar of these cars is to be computed. We know the random variable x bar has approximately a normal distributuion because of a. the law of large numbers b. the central limit theorem c. simpson's...

  • Question 12 2.5 pts The average age of cars owned by residents of Oshkosh is 4...

    Question 12 2.5 pts The average age of cars owned by residents of Oshkosh is 4 years with a standard deviation of 2.2 years. A simple random sample of 400 cars is selected, and the sample mean age is computed. What is the probability that the average age of the 400 cars is less than 3.8 years? 0.0344 0.5359 0.9656 0.4641

  • thank you so much for your help! have a great day and be safe <3 QUESTION...

    thank you so much for your help! have a great day and be safe <3 QUESTION 24 A recent study reported that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.80 and standard deviation 84.64. What proportion of women have blood pressures between 70.40 and 83.40? 0.1977 0.4811 O 0.0598 O 0.4641 QUESTION 25 The average age of cars owned by all residents of a small city is four years with a...

  • thank you so much for your help! have a great day and be safe <3 QUESTION...

    thank you so much for your help! have a great day and be safe <3 QUESTION 24 A recent study reported that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.80 and standard deviation 84.64. What proportion of women have blood pressures between 70.40 and 83.40? 0.1977 0.4811 O 0.0598 O 0.4641 QUESTION 25 The average age of cars owned by all residents of a small city is four years with a...

  • 17. The average age of residents in a large residential retirement community is 69 years with...

    17. The average age of residents in a large residential retirement community is 69 years with standard deviation 5.8 years. A simple random sample of 100 residents is to be selected, and the sample mean age X of these residents is to be computed. We know the random variable # has approximately a Normal distribution because of a) the central limit theorem. O b) the law of large numbers. c) the 68-95-99.7 rule. d) the population we're sampling from has...

  • 7. A group of university students are interested in comparing the average age of cars owned...

    7. A group of university students are interested in comparing the average age of cars owned by students and the average age of cars owned by faculty. They randomly selected 25 cars that are own by students and 20 cars that are owned by faculty. The average age and standard deviation obtained from the students' cars are 6.78 years and 5.21 years, respectively. The sample of faculty cars produced a mean and a standard deviation of 5.86 years, and 2.72....

  • 3. Age of runners. The average of the runners’ ages is µ = 34.05 years with...

    3. Age of runners. The average of the runners’ ages is µ = 34.05 years with a standard deviation of σ = 9.83. A simple random sample of 100 runners is taken. a. Find the standard deviation of the sample mean, σx. b. In your opinion, would you be surprised to get a sample (of size 100) with an average age of 36 years? Why or why not? (One idea: start by calculated this probability, the probability of getting an...

  • Cats live for 14 years on average, with a standard deviation of 2 years. A simple...

    Cats live for 14 years on average, with a standard deviation of 2 years. A simple random sample of 78 recently deceased cats is selected, and the sample mean age at death of these cats is computed. We know that the random variable has an approximately Normal distribution because of a. the law of large numbers. b. the fact that probability is the long-run proportion of times an event occurs. c. the 68–95–99.7 rule. d. the central limit theorem

  • Dogs live for 14 years on average, with a standard deviation of 2 years. A simple...

    Dogs live for 14 years on average, with a standard deviation of 2 years. A simple random sample of 78 recently deceased dogs is selected, and the sample mean age at death of these dogs is computed. We know the distribution of the sample mean is approximately normal here because of the central limit theorem the fact that dogs normally live approximately significantly longer than average dog the empirical rule the law of large numbers

  • Mean Income of NYC Household Heads: Suppose researchers want to conduct a study on the mean...

    Mean Income of NYC Household Heads: Suppose researchers want to conduct a study on the mean income of NYC household heads. From previous studies they know that the standard deviation in the population is approximately $30,000. 1) How large should a simple random sample be to estimate mean income with a standard error of $1,000? Show all main steps of your calculation. (No points will be given to an answer of only a final number provided even if the number...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT