Chapter 4: Q10. (page 217)
Stock market. Give an example of a continuous random variable that would be of interest to a stockbroker.
Short Answer
Example: The time taken by a stockbroker for the completion of the transactions of the stocks.
/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none}
Learning Materials
Features
Discover
Chapter 4: Q10. (page 217)
Stock market. Give an example of a continuous random variable that would be of interest to a stockbroker.
Example: The time taken by a stockbroker for the completion of the transactions of the stocks.
All the tools & learning materials you need for study success - in one app.
Get started for free
Shear strength of rock fractures. Understanding the characteristics
of rock masses, especially the nature of the fracturesis essential when building dams and power plants.The shear strength of rock fractures was investigated inEngineering Geology(May 12, 2010). The Joint RoughnessCoefficient (JRC) was used to measure shear strength.Civil engineers collected JRC data for over 750 rock fractures.The results (simulated from information provided in the article) are summarized in the accompanying SPSShistogram. Should the engineers use the normal probabilitydistribution to model the behavior of shear strength forrock fractures? Explain
Working on summer vacation. Recall (Exercise 3.13, p. 169) that a Harris Interactive (July 2013) poll found that 22% of U.S. adults do not work at all while on summer vacation. In a random sample of 10 U.S. adults, let x represent the number who do not work during summer vacation.
a. For this experiment, define the event that represents a 鈥渟uccess.鈥
b. Explain why x is (approximately) a binomial random variable.
c. Give the value of p for this binomial experiment.
d. Find P(x=3)
e. Find the probability that 2 or fewer of the 10 U.S. adults do not work during summer vacation.
Examine the sample data in the accompanying table.
5.9 5.3 1.6 7.4 8.6 1.2 2.1
4.0 7.3 8.4 8.9 6.7 4.5 6.3
7.6 9.7 3.5 1.1 4.3 3.3 8.4
1.6 8.2 6.5 1.1 5.0 9.4 6.4
a. Construct a stem-and-leaf plot to assess whether thedata are from an approximately normal distribution.
b. Compute sfor the sample data.
c. Find the values of QL and QU, then use these values andthe value of sfrom part b to assess whether the data comefrom an approximately normaldistribution.
d. Generate a normal probability plot for the data and useit to assess whether the data are approximately normal.
Suppose x is a binomial random variable with n = 3 and p = .3.
Give the z-score for a measurement from a normal distribution for the following:
a. 1 standard deviation above the mean
b. 1 standard deviation below the mean
c. Equal to the mean
d. 2.5 standard deviations below the mean
e. 3 standard deviations above the mean
What do you think about this solution?
We value your feedback to improve our textbook solutions.