Question

In: Statistics and Probability

The length of time it takes to find a parking space at 9 a.m. follows a...

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of five minutes and a standard deviation of two minutes. a) Based upon the empirical rule, which is the probability that it takes less than one minute to find a parking space? b) Based upon the empirical rule, which is the probability that it takes more than 7 minutes to find a parking space? c) Find the probability that it takes less than eight minutes to find a parking space d) non of the above

Solutions

Expert Solution


Related Solutions

The length of time it takes to find a parking space at 8am follows a normal...
The length of time it takes to find a parking space at 8am follows a normal distribution with a mean of 10 minutes and a standard deviation of 3 minutes. 1.Find the probability that it takes at most five minutes to find a parking space. 2.Find the probability that it takes at least 13 minutes to find a parking space. 3.Find the probability that it takes between 9 minutes to 11 minutes find a parking space. 4.25% of the time,...
*Generation time can best be defined as a. the length of time it takes for lag...
*Generation time can best be defined as a. the length of time it takes for lag phase b. the duration of log phase c. the time it takes for a cell to divide d. how many generations a cell can divide *Bacterial growth is usually graphed using ________. a. an arithmetic plot. b. a hyperbolic plot. c. a semi-logarithmic plot. d. an inverse plot. *Most bacteria reproduce by a. aerial hyphae. b. fragmentation. c. mitosis. d. binary fission. e. budding....
In a study of the length of time it takes to earn an associate’s degree, a...
In a study of the length of time it takes to earn an associate’s degree, a random sample of 41 students had a mean of 2.8 years. Assume that the population standard deviation is 0.9 years. You wish to construct a 99% confidence interval for the mean time it takes to earn an associate's degree. Use this information to answer the next 5 questions. (Be sure to use the correct distribution.) What is the confidence interval? Round to 2 decimal...
Karin arrives at the post office, which opens at 9:00 a.m., at 9:05 a.m. She finds...
Karin arrives at the post office, which opens at 9:00 a.m., at 9:05 a.m. She finds two cashiers at work, both serving one customer each. The customers started being served at 9:00 and 9:01, respectively. The service times are independent and Exp(8)-distributed. Let Tk be the time from 9:05 until service has been completed for k of the two customers, k = 1, 2. Find ETk for k=1 and 2. The answer is ET1 =4, ET2 =12.
Exercise 9-56 A shopping centre wants to examine the amount of space required for parking. Studies...
Exercise 9-56 A shopping centre wants to examine the amount of space required for parking. Studies indicated that 68% of staff and shoppers use public transportation. A survey of 1,002 was taken, and 663 responded that they used public transportation. a. State the null hypothesis and the alternate hypothesis. Round the final answers to 2 decimal places. H0: p =            H1: p ≠            b. State the decision rule for 0.10 significance level. (Negative answer should be...
The length of time it takes a baseball player to swing a bat (in seconds) is...
The length of time it takes a baseball player to swing a bat (in seconds) is a continuous random variable X with probability density function (p.d.f.) f(x) = ( ax + 8/9 for 0 ≤ x ≤ b (c) Calculate (to 3 decimal places of accuracy) the median of X. (d) What is the probability that the baseball player takes between 5 and 10 swings (inclusive) before a swing whose length is greater than the median in part (c) occurs...
The time that it takes for the next train to come follows a Uniform distribution with...
The time that it takes for the next train to come follows a Uniform distribution with f(x) =1/10 where x goes between 1 and 11 minutes. Round answers to 4 decimal places when possible. A)Find the probability that the time will be at most 7 minutes. B)Find the probability that the time will be between 4 and 6 minutes. C)The standard deviation is?
The length of time, in hours, it takes an "over 40" group of people to play...
The length of time, in hours, it takes an "over 40" group of people to play one soccer match is normally distributed with a mean of 2.2 hours and a standard deviation of 0.55 hours. A sample of size n = 80 is drawn randomly from the population. Find the probability that the sample mean is between 2.1 hours and 2.4 hours.
Let 'x' be a random variable that represents the length of time it takes a student...
Let 'x' be a random variable that represents the length of time it takes a student to write a term paper for Dr. Adam's Sociology class. After interviewing many students, it was found that 'x' has an approximately normal distribution with a mean of µ = 7.3 hours and standard deviation of ơ = 0.8 hours. For parts a, b, c, Convert each of the following x intervals to standardized z intervals. a.) x < 8.1   z < b.) x...
1. (15pts) The length of time it takes to get through the security checks at a...
1. (15pts) The length of time it takes to get through the security checks at a very large urban airport is a random variable with mean μ = 20.6 minutes and standard deviation σ = 8.4 minutes. A simple random sample of 36 airline passengers is to be observed going through security. ̄ a) What is the sampling distribution of the sample mean X? (Specify the distribution,mean μX ̄ and standard deviation σX ̄ of the sampling distribution of X)...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT