(Answered) Insurance is an important part of family spending average

Statistics

Insurance is an important part of family spending. Average car insurance per car is of interest to investigate. A random sample of 25 families are surveyed and we obtain the average car insurance premium is $780 and S.d. is $120 per year. Assume the car insurance premium is normally distributed.

(a) Find a 99% confidence interval for the average car insurance premium and interpret your result.

(b) What is the margin of error when using $780 to estimate the population average car insurance premium with 99% confidence? [Hint: (U-L)/2 ]

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91767009
Price:- $10

Verified Expert

Priced at $20 Now at $10, Verified Solution

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

If an urn1 contains 6purle balls and 4red balls and urn2

If an Urn1 contains 6purle balls and 4red balls. And Urn2 contains 4purple balls and 6 red balls. Urn3 contains 4purple balls and 5red balls. If one of the urns is selected at random and a ball is drawn, what is the prob ...

Jen amp barrys fast fresh salad bags starts with 280000

"Jen & Barry's Fast Fresh Salad Bags" starts with $280,000 invested. Jen and Barry pay 20% down and finance the balance with a 20-year small business loan at 4.5% compounded monthly. What is the amount of their monthly l ...

Use the standard normal distribution or Use the standard normal distribution or

Use the standard normal distribution or the? t-distribution to construct a 90?% confidence interval for the population mean. Justify your decision. If neither distribution can be? used. In a recent? season, the populatio ...

A coin is randomly picked from a collection of 10 coins the

A coin is randomly picked from a collection of 10 coins, the ith coin having a probabiliity i/10 of coming up heads. The coin in then flipped repeatedly until a head appears. Let X be the number of flips necessary. Find ...

Buses run every 15 minutes along a certain route during

Buses run every 15 minutes along a certain route during rush hour. The time that a person would have to wait at a bus stop is uniformly distributed between 0 and 18 minutes. a. What is the probability that this person ha ...

Suppose that the waiting time for a pizza to be delivered

Suppose that the waiting time for a pizza to be delivered to an individual's residence has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes. What is the probability th ...

One-year treasury bills currently earn 225 percent you

One-year Treasury bills currently earn 2.25 percent. You expected that one year from now, 1-year Treasury bill rates will increase to 2.75 percent and that two years from now, 1-year Treasury bill rates will increase to ...

1 table 1016 contains the value of the house and the amount

1 Table #10.1.6 contains the value of the house and the amount of rental income in a year that the house brings in ("Capital and rental," 2013). Create a scatter plot and find a regression equation between house value an ...

A clinical psychologist is the primary therapist for 18

A clinical psychologist is the primary therapist for 18 patients. She randomly selects a sample of 3 patients to be in her study. How many different samples of this size can be selected from this population of 18 patient ...

If no payments are made a loan of amount 44000 would

If no payments are made, a loan of amount $44000 would increase to $49103.89 after 2 years of monthly compounding interest. If instead, payments of $718.87 are made at the end of each month, how many years would it be un ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert