Introductory Statistics (2nd Edition)
2nd Edition
ISBN: 9780321978271
Author: Robert Gould, Colleen N. Ryan
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 72SE
Law of Large Numbers The table shows the results of rolling a fair six-sided die.
Using the table, find the empirical
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Question 3
The following stem-and-leaf displays the weekly salary of employees at this firm.
Stem-and-Leaf Display
Leaf Unit = 10.0
N=x
5
3 00123
12 4 0125888
(y)
5 11234456777
z
6 13568
5
7 154
2
8 46
i.
Determine the value of x, y and z.
[3]
ii. What is the value of the median?
[2]
iii.
Find the mode of this data set.
iv.
Calculate the range
[1]
[2]
Let Y be a continuous RV with PDF
otherwise
Find the CDF, Fry), of Y .
Find an expression for pth, p € (0, 1), quantile of the distribution.
Find E(Y) and V(Y).
Find E(-2Y + 1) and V(-3Y - 2).
Find E(Y3).
Let X be a continuous RV with CDF
Find P(X < 0), P(-1 < X < 1) and P(0.5 < X).
Based on your answers to the above questions, what is the median of the distribu-tion? Why
Find the PDF, fx (x), of X.
Chapter 5 Solutions
Introductory Statistics (2nd Edition)
Ch. 5 - Simulation (Example 1) If we flip a coin 10 times,...Ch. 5 - Simulation Suppose you are carrying out a...Ch. 5 - Empirical versus Theoretical A Monopoly player...Ch. 5 - Empirical versus Theoretical A person was trying...Ch. 5 - Empirical vs. Theoretical A friend flips a coin 10...Ch. 5 - Empirical vs. Theoretical A magician claims that...Ch. 5 - Criminal Court Judges Criminal cases are assigned...Ch. 5 - Random Assignment of Professors A study randomly...Ch. 5 - Which of the following numbers could not be...Ch. 5 - Which of the following numbers could not be...
Ch. 5 - Cards (Example 2) There are four suits: clubs ,...Ch. 5 - Playing Cards Refer to exercise 5.11 for...Ch. 5 - Guessing on Tests a. On a true/false quiz in which...Ch. 5 - Guessing on Tests Consider a multiple-choice test...Ch. 5 - Four Children (Example 3) The sample space given...Ch. 5 - Three Coins The sample shows the possible...Ch. 5 - Birthdays What is the probability that a baby will...Ch. 5 - Playing Cards If one card is selected from a...Ch. 5 - College Poll A StatCrunch poll asked people if...Ch. 5 - College Poll Refer to the table given for Exercise...Ch. 5 - College Pol: “AND” (Example4) Refer to the table...Ch. 5 - College Poll: “AND” Refer to the table given for...Ch. 5 - College Poll: “OR” (Example 5) Refer to the table...Ch. 5 - College Poll: OR Refer to the table given for...Ch. 5 - College Poll: "OR" (Example 6) Refer to the table...Ch. 5 - College Poll: OR Refer to the table given for...Ch. 5 - College Poll: Mutually Exclusive (Example 7)...Ch. 5 - College Poll: Not Mutually Exclusive Refer to the...Ch. 5 - Mutually Exclusive Suppose a person is selected at...Ch. 5 - Mutually Exclusive Suppose a person is selected at...Ch. 5 - "OR" for Homeowners In the United States, the...Ch. 5 - "OR" with Rain Suppose a weather forecaster says...Ch. 5 - Fair Die (Example 8) Roll a fair six-sided die. a....Ch. 5 - Roll a Die Roll a fair six-sided die. a. What is...Ch. 5 - Grades Assume that the only grades possible in a...Ch. 5 - Changing Multiple-Choice Answers One of the...Ch. 5 - Voting Suppose that in an election, adults are...Ch. 5 - Ages The mothers of Mrs. Moss's first grade...Ch. 5 - "AND" and "OR" Consider these categories of...Ch. 5 - "AND" and "OR" Assume that we are talking about...Ch. 5 - "AND" and "OR" Considering all the adults in the...Ch. 5 - "AND" and "OR" Considering all the students at...Ch. 5 - Thumbtacks When a certain type of thumbtack is...Ch. 5 - Thumbtacks When a certain type of thumbtack is...Ch. 5 - Multiple-Choice Exam An exam consists of 12...Ch. 5 - Driving Exam A driving exam consists of 30...Ch. 5 - College poll Again: Is College Worth it (Example...Ch. 5 - College Poll A person is selected randomly from...Ch. 5 - College Poll (Example 10) Use the data given in...Ch. 5 - College Poll Use the data given in Exercise 5.47....Ch. 5 - Independent? Suppose a person is chosen at random....Ch. 5 - Independent? About 12#37; of men and 10#37; of...Ch. 5 - Independent? Suppose a person is chosen at random....Ch. 5 - Independent? Ring sizes typically range from about...Ch. 5 - College Poll (Example 11) Refer to the table in...Ch. 5 - College Poll Assume a person is selected randomly...Ch. 5 - Hand Folding (Example 13) When people fold their...Ch. 5 - Dice When two dice are rolled, is the event “the...Ch. 5 - Happiness and Tradition Views (Example 13) In the...Ch. 5 - Happiness Using the table in Exercise 5.59,...Ch. 5 - Coin (Example 15) Imagine flipping three fair...Ch. 5 - Die Imagine rolling a fair six-sided die three...Ch. 5 - Die Sequences (Example 16) Roll a fair six-sided...Ch. 5 - Babies Assume that babies born are equally likely...Ch. 5 - Recidivism (Example 16) Florida's recidivism rate...Ch. 5 - Seat Belt Use Scat belt use in Michigan in 2012 is...Ch. 5 - Cervical Cancer (Example 18) According to a study...Ch. 5 - Cervical Cancer About 8 women in 100,000 have...Ch. 5 - Simulating Coin Flips (Example 18) a. Simulate...Ch. 5 - Simulation a. Explain how you could use digits...Ch. 5 - Law of Large Numbers Refer to Histograms A, B, and...Ch. 5 - Law of Large Numbers The table shows the results...Ch. 5 - Coin Flips Imagine flipping a fair coin many...Ch. 5 - Coin Flips, Again Refer to the following figure....Ch. 5 - Law of Large Numbers: Gambling Betty and Jane are...Ch. 5 - LLN: Grandchildren Consider two pairs of...Ch. 5 - LLN: Coin If you flip a fair coin repeatedly and...Ch. 5 - LLN: Die The graph shows the average when a...Ch. 5 - Jury Duty A jury is supposed to represent the...Ch. 5 - Left-handed Some estimates say that 10#37; of the...Ch. 5 - Simulation: Four-Sided Die a. Explain how you...Ch. 5 - Simulation: Six-Sided Die a. Explain how you could...Ch. 5 - Capitalism According to a Pew poll conducted in...Ch. 5 - Socialism According to Pew poll conducted in 2012,...Ch. 5 - Independent Variables Use your general knowledge...Ch. 5 - Independent Variables Use your general knowledge...Ch. 5 - Death Penalty According to a Gallup poll conducted...Ch. 5 - Gay and Lesbian Relationships According to a...Ch. 5 - Internet Access A 2013 Pew poll said that 93 of...Ch. 5 - SAT ores The probability of a randomly selected...Ch. 5 - Birthdays Suppose all the days of the week are...Ch. 5 - Pass Rate of Written Driver’s Exam In California,...Ch. 5 - Rich Happier 2012 A Gallup poll asked, "Do you...Ch. 5 - Rich Happier 1990 A Gallup poll asked, "Do you...Ch. 5 - Likely to Become Rich? A Gallup poll conducted in...Ch. 5 - Benefits from Rich A Gallup poll conducted in 2012...Ch. 5 - Virginia Juveniles In Virginia, in 2010,...Ch. 5 - California Recidivism In California, the...Ch. 5 - California Recidivism and Gender Women return to...Ch. 5 - Blue Eyes About 17#37; of American men have blue...Ch. 5 - Construct a two-way table with 60 women and 80 men...Ch. 5 - Construct a two-way table with 60 women and 80 men...Ch. 5 - Law of Large Numbers A famous study by Amos...Ch. 5 - Law of Large Numbers A certain professional...Ch. 5 - Simulating Guessing on a Multiple-Choice Test...Ch. 5 - Simulating Guessing on a True/False Test Perform a...Ch. 5 - Red Light/Green Light A busy street has three...Ch. 5 - Soda A soda-bottling plant has a flaw in that...Ch. 5 - GSS: Political Party The General Social Survey...Ch. 5 - GSS: Political Party Refer to the table given in...Ch. 5 - GSS: AND Refer to the table given in Exercise...Ch. 5 - GSS: AND Refer to the table given in Exercise...Ch. 5 - GSS: OR Select someone at random from the 1858...Ch. 5 - GSS: OR Select someone at random from the 1858...Ch. 5 - GSS: OR Assume one person is chosen randomly from...Ch. 5 - GSS: OR Assume that one person is chosen randomly...Ch. 5 - GSS: Mutually Exclusive Referring to the table...Ch. 5 - GSS: Mutually Exclusive Referring to the table...Ch. 5 - Political Party, Again A person is selected...Ch. 5 - Political Party Use the table in Exercise 5.109. A...Ch. 5 - Political Party, Again Refer to the table for...Ch. 5 - Party, Again Refer to the table for Exercise...Ch. 5 - Coin Flips Let H stand for heads and let T stand...Ch. 5 - Cubes A hat contains a number of cubes: 15 red, 10...Ch. 5 - Mutually Exclusive Suppose a person is selected at...Ch. 5 - Mutually Exclusive Suppose a person is selected at...Ch. 5 - “OR” The Humane society of the United States...Ch. 5 - “OR” Suppose you discovered that on your college...Ch. 5 - UFOs When two people meet, they are sometimes...Ch. 5 - Seat Belt Use In 2009, the National Highway...Ch. 5 - Independent Imagine rolling a red die and a blue...Ch. 5 - Mutually Exclusive Imagine rolling a red die and a...Ch. 5 - Opinion about Nurses A Gallup Poll from December...Ch. 5 - Climate Change A Gallup poll from December of 2009...
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- A survey of 581 citizens found that 313 of them favor a new bill introduced by the city. We want to find a 95% confidence interval for the true proportion of the population who favor the bill. What is the lower limit of the interval? Enter the result as a decimal rounded to 3 decimal digits. Your Answer:arrow_forwardLet X be a continuous RV with PDF where a > 0 and 0 > 0 are parameters. verify that f-∞ /x (x)dx = 1. Find the CDF, Fx (7), of X.arrow_forward6. [20] Let X be a continuous RV with PDF 2(1), 1≤x≤2 fx(x) = 0, otherwisearrow_forward
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