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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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5. Inference.Consider the sample of students at the University of Reading in Table 3.Table 3: Hours spent studying per weekStudent ID. Hours spent studyingID1. 1ID2. 2ID3. 3ID4. 5ID5. 4ID6. 5ID7. 7ID8. 7ID9. 12ID10 5ID11. 7ID12 7ID13 15ID14. 0ID15. 3ID16. 4ID17. 4ID18 . 0ID19. 5ID20. 7ID21. 7ID22 . 13ID23. 7ID24. 9 a) Consider the possibility of using this sample to make…
18 Records of a credit card company show that 30% of its cardholders over age 50 dispute one or more charges on their statements during the year. is selected. Assuming the records are correct, find the probability that: A random sample of 10 cardholders over age 50
Feb 17 AA A ezto.mheducation.com Welcom OML Welcome to... X Question 5... www.youtu... O Sign In | Ind... 3.1 G Saved Help Save & Exit Which of the numbers are prime? а. 211 OA. Prime OB. Not Prime b. 885 OA. Prime В. Not Prime c. 531 A. Prime В. Not Prime
8. Cheap plastic children's dice are made by pressing divots in the die faces causing the dice to be unbalanced, e.g. the side with a 6 will be light and the side with a 1 will be heavy. To test this claim, dice were rolled 180 times and the observed frequencies of 1-6 were found to be 30, 32, 22, 34, 39, 23. (The data are in worksheet 9.8.) Test the observed frequencies to see if they are consistent with the null hypothesis Ho: The dice are balanced versus HA: The dice are unbalanced by: a. Manual calculate the x² statistic and compare it to the appropriate critical value. b. Confirm your answer to part a using MINITAB Stat> Tables> Chi-square Goodness of Fit Test (One Variable).
The inferential procedures discussed in this book are intended for use with only one particular sampling procedure. What sampling procedure is that?
4.Suppose that the random variable x has the following table Class Freq. 0-7 2 8-15 10 . Calculate the mean. . Calculate the mode. . Calculate the median. 1. s² & s. .C.V. range. . Sk. 16-23 24-31 32-39 832 whair Csen DC
9. A student researcher is assigned the task of finding out if the level of education attained by a person depended on the income class to which he/she belonged. He interviews 60 persons. The results are recorded on the table below. Level of Income Bracket Education A в Attained High School 15 Graduate College Graduate With MA/PhD Degrees 2 10 3 4 5. The student applies a test of independence at 5% level. What is his conclusion?
gen.wileyplus.com/edugen/student/mainfr.uni Mann, Introductory Statistics, 9e ce Assignment Gradebook ORION Downloadable eTextbook ent Chapter 11, Section 11.3, Problem 021 Consider the following contingency table that is based on a sample survey. Column 1 Column 2 Column 3 Row 1 138 89 79 Row 2 93 50 89 Row 3 122 78 113 a. Write the null and alternative hypotheses for a test of independence for this table. Ho: Rows and columns are H: Row and columns are b. Calculate the expected frequencies for all cells assuming that the null hypothesis is Round your answers to three decimal places, where required. Column 1 Column 2 Column 3 Row 1
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1. Suppose there are nine sections of Intro Stats with 25 students each. You ‘randomly’ choose two studentsfrom each section to use as asample. Which of the following results best describes this type of sample?A. a random, stratified sampleB. a simple random sampleC. a random, clustered sampleD. a non-random, systematic sampleE. a random, convenient sample 2. Suppose there are nine sections of Intro Stats with 25 students each. You place all 225 student’s namesin a hat and ‘randomly’ draw 30 student names to use as asample. Which of the following results bestdescribes this type of sample?A. a random, stratified sampleB. a simple random sampleC. a random, clustered sampleD. a non-random, systematic sampleE. a random, convenient sample 3. Assume the heights of students at College are normally distributed with a mean of 64.0 inchesand a standard deviation of 1.2 inches. Which of the following values best approximates the probabilityof randomly selecting aCollege student tallerthan 62.2…
9. The taste test for PTC (phenylthiourea) is a common class demonstration in the study of genetics. It is know that 70% of the American population are "tasters" and 30% are "non-tasters". Suppose a genetics class of size 20 does the test to see if they match the U.S. percentages of "tasters" and “non-tasters". Assume the assignment of students to classes is a random process. a. Use the binomial expansion formula to write the expression you would use to find P(X=15 tasters) but do not evaluate the expression. Answer: b. Evaluate the expression in part a using a calculator. Answer: c. Using the notation in part a.), write out all of the probabilities need to evaluate P(X < 5 non-tasters). Use your calculator to evaluate the probability. Answer: d. Explain what probabilities you would use to evaluate P(3 < X < 9) Answer:
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