30. The speeds (in mph) of motor vehicles on a certain stretch of Route 3A asclocked at a certain place along the highway are normally distributed with amean of 64.2 mph and a standard deviation of 8.44 mph. What is theprobability that a motor vehicle selected at random is traveling at...(A) More than 65 mph?(B) Less than 60 mph?o3 Xe 00/9 OH007(C) Between 65 and 70 mph?

Mean (µ) = 64.2Standard Deviation (σ) = 8.44Probability that a motor vehicle selected at random is…

Answered: 30. The speeds (in mph) of motor…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Supposed that the mean age of the employees of warrior's corporation is 45.5 years and the standard deviation is 7.25 and it is normally distributed. What is the probability that a group of randomly selected employees whose age falls between 45.5 and 50.25 years old? Select the correct response: 0.2445 0.2454 O 0.3824 0.4245
7. Use R: Suppose the yearly income of people in Minnesota is normally distributed with mean 45,700 and standard deviation 2830. Find the probability that 10 randomly selected people have mean (Xbar) income between 44000 and 48000.
1. Use the following to answer questions (a)-(c): The daily sales at a convenience store produce a distribution that is approximately normal with a mean of 1220 and a standard deviation of 130. a. The probability that the sales on a given day at this store are more than $1,405, rounded to four decimal places, is: b. The probability that the sales on a given day at this store are less than $1,305, rounded to four decimal places, is: c. The probability that the sales on a given day at this store are between $1,200 and $1,300, rounded to four decimal places, is:
17).
Q2) In a local puncher shop, the bolt of a Tyre is normally distributed, with a mean of 0.82 cm and a standard deviation of 0.04 cm. What is the probability that the bolt will exceed 0.86 cm ? (Round your answer to three decimal places.)
81223456 Number of Accidents ('x = X)d 0.28 Daily (X) 0.31 0.19 0.08 0.07 0.05 0.02 a given day? MacBook
Suppose that the mean and standard deviation of plants height are 130 and 32, respectively, if a random sample of size 49 is slected from these plants, then the probability that their average height is more than 125 is closest to: O a. 0.20 O b.0.86 Oc. 0.26 O d. 0.14 O e. 0.74 Next page
Suppose that the speed at which cars go on the freeway is normally distributed with mean 66 mph and standard deviation 5 miles per hour. Let X be the speed for a randomly selected car.a. What is the distribution of X? X ~ N( ________ , ________)b. If one car is randomly chosen, find the probability that it is traveling more than 62 mph. Round to 4 decumal places. c. If one of the cars is randomly chosen, find the probability that it is traveling between 68 and 71 mph. Round to 4 decimal places.
6.2) The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $12. Find the probability that a randomly selected utility bill is a) less than $70 b) between $90 and $120 c) more than $140
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.6 days and a standard deviation of 2.3 days. 1.) What is the probability of spending more than two days in recovery? A.)0.8709 B.) 0.0495 C.) 0.9412 D.) 0.0588 2.) The 80th percentile for recovery times is? A.) 7.54 B.) 4.24 C.) 7.01 D.) 6.81
4. The amount of time between taking a pain reliever and getting relief is normally distributed with a mean of 25 minutes and a standard deviation of 3 minutes. Find the probability that the time between taking the medication and getting relief is as follows. a. At least 30 minutes b. At most 20 minutes 5. All incoming freshmen at a major university are given a mathematics diagnosti exam. The scores are normally distributed with a mean of 120 and a standa deviation of 25. If a student scores less than a certain score, he or she will have undergo an intervention program. Find the cutoff score at which 64% of the stude would have to undergo the intervention program. 2021.04.10 09:47
According to a study conducted by a statistical organization, the proportion of people who are satisfied with the way things are going in their lives is 0.88. Suppose that a random sample of 100 people is obtained. Complete parts (a) through (e) below. (a) Suppose the random sample of 100 people is asked, "Are you satisfied with the way things are going in your life?" Is the response to this question qualitative or quantitative? Explain. A. The response is qualitative because the responses can be classified based on the characteristic of being satisfied or not. B. The response is quantitative because the number of people satisfied can be counted. C. The response is quantitative because the responses can be classified based on the characteristic of being satisfied or not. D. The response is qualitative because the number of people satisfied can be counted. (b) Explain why the sample proportion, p, is a random variable. What is the source…

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