6. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 300 and a standard deviation of 40. If an applicant is randomly selected, find the probability of a rating that is more than 32.5. a. 0.2981 b. 0.2643 с. 0.7019 d. 0.2676 7. Times to gather preliminary information from arrivals at an outpatient clinic follow an exponential distribution with mean 15 minutes. Find the probability, for a randomly chosen arrival, that less than 30 minutes will be required. A- 0.4896 B- 0.3689 C- 0.3254 D- 0.8647 8. Professor Whata Guy surveyed a random sample of 420 statistics students. One of the questions was "Will you take another mathematics class?" The results showed that 252 of the students said yes. What is the point estimate of the proportion of students who said No? A- 0.4 B- 0.252 C- 0.775 D- 0.6 9. Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample of 100 items is drawn from this population. What is the standard error of the mean? A- 0.25 B- 1.8 C- 18.0 D- 2.5 10. Service times for customers at a library information desk can be modeled by an exponential distribution with a mean service time of 5 minutes. What is the probability that a customer service time will take longer than 10 minutes? A- 0.1672 B- 0.1353 C- 0.2642 D- 0.2436
6. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 300 and a standard deviation of 40. If an applicant is randomly selected, find the probability of a rating that is more than 32.5. a. 0.2981 b. 0.2643 с. 0.7019 d. 0.2676 7. Times to gather preliminary information from arrivals at an outpatient clinic follow an exponential distribution with mean 15 minutes. Find the probability, for a randomly chosen arrival, that less than 30 minutes will be required. A- 0.4896 B- 0.3689 C- 0.3254 D- 0.8647 8. Professor Whata Guy surveyed a random sample of 420 statistics students. One of the questions was "Will you take another mathematics class?" The results showed that 252 of the students said yes. What is the point estimate of the proportion of students who said No? A- 0.4 B- 0.252 C- 0.775 D- 0.6 9. Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample of 100 items is drawn from this population. What is the standard error of the mean? A- 0.25 B- 1.8 C- 18.0 D- 2.5 10. Service times for customers at a library information desk can be modeled by an exponential distribution with a mean service time of 5 minutes. What is the probability that a customer service time will take longer than 10 minutes? A- 0.1672 B- 0.1353 C- 0.2642 D- 0.2436
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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Question
6. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 300 and a standard deviation of 40. If an applicant is randomly selected, find the probability of a rating that is more than 32.5.
a. 0.2981
b. 0.2643
с. 0.7019
d. 0.2676
7. Times to gather preliminary information from arrivals at an outpatient clinic follow an exponential distribution with mean 15 minutes. Find the probability, for a randomly chosen arrival, that less than 30 minutes will be required.
A- 0.4896
B- 0.3689
C- 0.3254
D- 0.8647
8. Professor Whata Guy surveyed a random sample of 420 statistics students. One of the questions was "Will you take another mathematics class?" The results showed that 252 of the students said yes. What is the point estimate of the proportion of students who said No?
A- 0.4
B- 0.252
C- 0.775
D- 0.6
9. Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. A sample of 100 items is drawn from this population. What is the standard error of the mean?
A- 0.25
B- 1.8
C- 18.0
D- 2.5
10. Service times for customers at a library information desk can be modeled by an exponential distribution with a mean service time of 5 minutes. What is the probability that a customer service time will take longer than 10 minutes?
A- 0.1672
B- 0.1353
C- 0.2642
D- 0.2436
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