Question

Amy and Molly go to three parties the night before graduation. For where they live, the...

Amy and Molly go to three parties the night before graduation. For where they live, the time spent at any party follows a normal distribution with a mean of 35 minutes and a standard deviation of 10 minutes. What is the probability that they stay at the first party for more than 31 minutes?

Homework Answers

Answer #1

PLEASE like me solution

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The amount of time spent by a statistical consultant with a client at their first meeting...
The amount of time spent by a statistical consultant with a client at their first meeting is a random variable having a normal distribution with a mean value of 60 minutes and a standard deviation of 10 minutes. What is the probability that more than 45 minutes is spent at the first meeting? Round your answer to three decimal places.
You often go to a certain restaurant for breakfast. You believe that the length of time...
You often go to a certain restaurant for breakfast. You believe that the length of time X spent waiting to pick up your food on any given visit follows a normal distribution with mean 4 minutes and standard deviation 1.5 minutes. You will become impatient if you have to wait too long for your food. In fact, you decide you will become impatient if your wait time falls in the worst 5% of the distribution. How long should you wait...
Among U.S. cities with a population of more than 250,000 the mean one-way commute to work...
Among U.S. cities with a population of more than 250,000 the mean one-way commute to work is 25 minutes. The longest one-way travel time is New York City, where the mean time is 40 minutes. Assume the distribution of travel times in New York City follows the normal probability distribution and the standard deviation is 7.5 minutes. a. What percent of the New York City commutes are for less than 30 minutes? b. What percent are between 30 and 35...
Will rate for all three questions. Please and thank you! Job Interview: Length The personnel office...
Will rate for all three questions. Please and thank you! Job Interview: Length The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records, they have found that the length of a first interview is normally distributed, with mean m 5 35 minutes and standard deviation s 5 7 minutes. (a) What is the probability that a first interview will last 40 minutes or longer? (b) Nine first interviews...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $35 and the estimated standard deviation is about $7. (a) Consider a random sample of n = 80 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the probability distribution of x, the average amount...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $29 and the estimated standard deviation is about $7. (a) Consider a random sample of n = 40 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the probability distribution of x, the average amount...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $33 and the estimated standard deviation is about $6. (a) Consider a random sample of n = 50 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the probability distribution of x, the average amount...
When people take sleeping medicine they would like to go to sleep as quickly as possible....
When people take sleeping medicine they would like to go to sleep as quickly as possible. For a new sleeping drug a study was done comparing time to go to sleep with the new pill to known time to go to sleep without any pill. Previous research shows that on average without a pill people fall asleep in mean time of μ{"version":"1.1","math":"<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>μ</mi></math>"} = 15 minutes with a standard deviation of σ = 10 minutes. A study was done on...
1) The amount of money spent weekly on cleaning, maintenance, and repairs at a large restaurant...
1) The amount of money spent weekly on cleaning, maintenance, and repairs at a large restaurant was observed over a long period of time to be approximately normally distributed, with mean μ = $599 and standard deviation σ = $42. (a) If $646 is budgeted for next week, what is the probability that the actual costs will exceed the budgeted amount? (Round your answer to four decimal places.) (b) How much should be budgeted for weekly repairs, cleaning, and maintenance...
1) A researcher reports that when groups of four children are randomly selected from a population...
1) A researcher reports that when groups of four children are randomly selected from a population of couples meeting certain criteria, the probability distribution for the number of girls, ?, is given in the following table where ? is a positive constant. x ?(?) ?(? ≤ ?) 0 0.4 ? 1 ? ? 2 3? − 0.2 ? 3 2? ? 4 0.2 ? a) Find ?(2). b) Complete the column of cumulative probability. (Please rewrite the table in your...