EP BASIC BUS.STATS-ACCESS (18 WEEKS)
14th Edition
ISBN: 9780135989005
Author: BERENSON
Publisher: PEARSON CO
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Chapter 4, Problem 20PS
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. Consider the following information.
P(Z) = 0.73
P(A) = 0.25
P(Z and A) = 0.15
Part A: Determine P(Z|A).
Part B: Determine P(A|Z).
An automobile service facility specializing in engine tune-ups knows that 50% of all tune-ups are done on four-cylinder automobiles, 20% on six-cylinder automobiles, and 30% on eight-cylinder automobiles. Let X = the number of cylinders on the next car to be tuned. What is the pmf of X?
A. Nine students held their breath, once after breathing normally and relaxing for one minute, and once
after hyperventilating for one minute. The table indicates how long (in sec) they were able to hold
their breath. Is there an association between the two variables?
(X-X BAR)² (Y-Y BAR)?
Normal (X) Hypervent (y) X-X BAR
87
91
Y-Y BAR OX-X BAR) (Y-Y BAR)
56
56
65
85
91
75
65
50
28
25
87
44
122
66
35
58
INTERPRETATION:
Chapter 4 Solutions
EP BASIC BUS.STATS-ACCESS (18 WEEKS)
Ch. 4 - Three coins are tossed. a. Give an example of a...Ch. 4 - An urn contain 12 red balls and 8 white balls. One...Ch. 4 - Consider the following contingency table: What is...Ch. 4 - Consider the following contingency table: What is...Ch. 4 - For each of the following, indicate whether the...Ch. 4 - For each of the following, state whether the...Ch. 4 - Which of the following events occur with a...Ch. 4 - Do Millennials or Gen-Xers feel more tense or...Ch. 4 - Referring to the contingency table in Problem 4.8,...Ch. 4 - How will markers change their social media use in...
Ch. 4 - Referring to the contingency table in Problem...Ch. 4 - Have the gains in student learning attributed to...Ch. 4 - Do Generation X and Boomers differ in how they use...Ch. 4 - A survey of 1,520 Americans, adults asked, “Do...Ch. 4 - Each year ratings are compiled concerning the...Ch. 4 - Consider the following contingency table: What is...Ch. 4 - Consider the following contingency table: What is...Ch. 4 - If P(AandB)=0.4andP(B)=0.8,findP(AB).Ch. 4 - Prob. 19PSCh. 4 - ...Ch. 4 - Do Millennials or Gen-Xers feel more tense...Ch. 4 - How will marketers change their social media use...Ch. 4 - Do generation X and Boomers differ in how they use...Ch. 4 - Have the grains in student learning attributed to...Ch. 4 - A survey of 1,520 Americans adults asked “Do you...Ch. 4 - Each year, rating are compiled concerning the...Ch. 4 - In 42 of the 66 years from 1950 through 2010 (in...Ch. 4 - A standard deck of cards is being used to play a...Ch. 4 - A box of nine iPhone 7 cellphones contains two red...Ch. 4 - ...Ch. 4 - ...Ch. 4 - In Example 4.10 to suppose that the probability...Ch. 4 - Big Commerce launched a study to analyze modern...Ch. 4 - Olive Construction Company is determining whether...Ch. 4 - The 2016 Global Information Security Workforce...Ch. 4 - The editor of a textbook published company is...Ch. 4 - A municipal bond service has three rating...Ch. 4 - If there are 10 multiple-choice question on an...Ch. 4 - A lock on a bank vault consists of three dials,...Ch. 4 - a. If a coin is tossed seven times, how many...Ch. 4 - A particular brand of women’s jeans is available...Ch. 4 - Prob. 42PSCh. 4 - A team is being formed that includes four...Ch. 4 - In the National Basketball League there are five...Ch. 4 - Referring to Problem 4.44 how many different...Ch. 4 - A gardener has six rows available in his vegetable...Ch. 4 - How many different ways can a senior project...Ch. 4 - Four member of a group of 10 people are to be...Ch. 4 - A student has seven books that she would like to...Ch. 4 - A daily lottery is conducted in which 2 winning...Ch. 4 - There are 15 exercise bikes in a fitness store...Ch. 4 - What are the differences between a priori...Ch. 4 - What is the difference between a simple event and...Ch. 4 - How can you use the general addition rule to find...Ch. 4 - What is the difference between mutually exclusive...Ch. 4 - How does conditional probability relate to the...Ch. 4 - How does the multiplication rule differ for events...Ch. 4 - How can you use Bayes theorem in light of new...Ch. 4 - In Bayes’ theorem, how does the prior...Ch. 4 - What is the difference between Counting Rule 1 and...Ch. 4 - What is the difference between a permutation and...Ch. 4 - A survey by Accenture indicated that 64% of...Ch. 4 - Chartered Institute of personnel and Development...Ch. 4 - To better understand the website builder market,...Ch. 4 - Content Marketing institute provides insight on...Ch. 4 - The CMO survey collects and dissemination the...
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- aIf HP=4, PJ=5, and PM=2, find LP. _ bIf HP=x+1, PJ=x1, LP=8, and PM=3, find x. _arrow_forwardSolve for X in the Equation, given A=-2-1103-4 and B=0320-4-1 a X=3A2B b 2X=2AB c 2X+3A=B d 2A+4B=-2Xarrow_forwardDarley and Latané (1968) recorded the speed with which subjects summoned help for a person in trouble. Subjects thought either that they were the only one listening to the person (Group 1, n 5 13), that one other person was listening (Group 2, n 5 26), or that four other people were listening (Group 3, n 5 13). The dependent variable was the speed with which the person summoned help (5 1/time × 100). The mean speed scores for the three groups were 0.87, 0.72, and 0.51, respectively. The MSerror was 0.053. Reconstruct the analysis of variance summary table. What can you conclude?arrow_forward
- The following table was generated from the sample data of 10 junior high students regarding the average number of hours they are unsupervised per nigh, the average number of hours they play video games per night, and their final grades in their math class. The dependent variable is the final grade, the first independent variable (x1) is the number of hours unsupervised each night, and the second independent variable (x2) is the number of hours of video games each night. Coefficients Standard Error t-Stat p-value Intercept 50.375000 7.719473 6.525704 0.000326 Hours Unsupervised 6.682500 1.484194 4.502444 0.002790 Hours Playing Video Games 1.535000 1.145568 1.339947 0.222124 Step 1: Write the multiple regression equation for the computer output given. y=_+_x1+_x2 Step 2: Indicate if any of the independent variables could be eliminated at the 0.05 level of significance. A) x1 B) x2 C) Keep all variablesarrow_forwardA chi-square test for independence is being used to evaluate the relationship between two variables. If the test has df = 1, what can you conclude about the two variables? a.One variable consists of 2 categories and the other consists of 4 categories. b.Both variables consist of 2 categories. c.Both variables consist of 3 categories. d.One variable consists of 2 categories and the other consists of 3 categories.arrow_forwardSuppose that in a research it was discovered that those who majored in math, engineering, or computer science scored higher on tests measuring "problem-solving" ability at the end of 4 years of college than did those students who did not major in these fields. A. What is (are) the independent variable(s)?arrow_forward
- lecture(12.11D): Researchers were interested in the effects of co-sleeping on nightime waking and crying in infants. .They assesed the number of minutes parents reported that their infants were awake and crying for a period of three days. Five of the infants co-slept with thier mothers(Co) and four infants slept in crib(Cr).The researchers wanted to see if there was a difference in the total number of minutes of crying during the 3 nights. for the two groups. A summary of the data is given below Co-sleepers night time crying in minutes: 8, 4, 7, 7, 6 Crib-sleepers night time crying in minutes: 30, 17, 22, 25 Test the hypotheses at (aplha=.05) level of signifcance. using the 5 step hypotheses testing procedure. Clealy state the null and alternative hypotheses. Round your answer to 2 decimal places.arrow_forward3.3.9 Patty has just completed her second semester in college. She earned a grade of A in her 5-hour calculus course, a grade of A in her 3-hour government course, a grade of A in her 4-hour engineering course, and a grade ofC in her 1-hour studio art course. Assuming that A equals 4 points, B equals 3 points, C equals 2 points, D equals 1 point, and F is worth no points, determine Patty's grade-point average for the semester. HW Score: 49 42%, 11.37 of 23 pts Patty's grade point average is Question Help y (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer. Clear Al 1OM AM All parts showing 20/ O Type here to search F4 FZ %23 3. 2 42 AT Enter W (2arrow_forwardThe following table was generated from the sample data of 10 junior high students regarding the average number of hours they are unsupervised per night, the average number of hours they play video games per night, and their final grades in their math class. The dependent variable is the final grade, the first independent variable (x1) is the number of hours unsupervised each night, and the second independent variable (x2) is the number of hours of video games each night. Intercept 52.536016 9.353956 5.616449 0.000802 Hours Unsupervised 7.173889 1.656518 4.330703 0.003435 Hours Playing Video Games 2.025042 1.731352 1.169631 0.280429 Step 1 of 2:Write the multiple regression equation for the computer output given. Round your answers to three decimal places. Step 2 of 2:Indicate if any of the independent variables could be eliminated at the 0.010.01 level of significance. (x1, x2, or keep all variables)arrow_forward
- The following table was generated from the sample data of 10 junior high students regarding the average number of hours they are unsupervised per night, the average number of hours they play video games per night, and their final grades in their math class. The dependent variable is the final grade, the first independent variable (x1) is the number of hours unsupervised each night, and the second independent variable (x2) is the number of hours of video games each night. Coefficients Standard Error t-Stat p-value Intercept 62.711817 4.607133 13.611896 0.000010 Hours Unsupervised 0.635048 0.915495 0.693666 0.513836 Hours Playing Video Games 7.528738 1.296727 5.805955 0.001145 Copy Data Step 1 of 2: Write the multiple regression equation for the computer output given. Round your answers to three decimal places. Answer 田 Tables 国 Keypad How to enter your answer (opens in new window) Keyboard Shortcuts X +arrow_forwardThe following table was generated from the sample data of 10 junior high students regarding the average number of hours they are unsupervised per night, the average number of hours they play video games per night, and their final grades in their math class. The dependent variable is the final grade, the first independent variable (x1) is the number of hours unsupervised each night, and the second independent variable (x2) is the number of hours of video games each night. Coefficients Standard Error t-Stat p-value Intercept 62.711817 4.607133 13.611896 0.000010 Hours Unsupervised 0.635048 0.915495 0.693666 0.513836 Hours Playing Video Games 7.528738 1.296727 5.805955 0.001145 Copy Data Step 2 of 2: Indicate if any of the independent variables could be eliminated at the 0.05 level of significance. E Tables E Keypad Answer Keyboard Shortcuts O x2 O Keep all variablesarrow_forwardConsider the following population model for household consumption: cons = a + b1 * inc+ b2 * educ+ b3 * hhsize + u where cons is consumption, inc is income, educ is the education level of household head, hhsize is the size of a household. Suppose that the variable for consumption is measured with error, so conss = cons + e, where conss is the mismeaured variable, cons is the true variable, e is random, i.e., e is independent of all the regressors. What would we expect and why? A) OLS estimators for the coefficients will all be biased B) OLS estimators for the coefficients will all be unbiased C) ALL the standard errors will be bigger than they would be without the measurement error D) both B and Carrow_forward
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