A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Which of the following is the
"When a button is pressed, a computer program outputs a random odd number greater than 1 and less then 9. You press the button twice."
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- You are interested in which job has the highest average salary. You decide to test if accountants, engineers, and lawyers have the same average starting salary. The collected data, in terms of thousands of dollars, is summarized in the table below. Accountants Engineers Lawyers ?n 37 27 41 ?⎯⎯⎯x¯ 76 81 58 ?s 4 3 2 Assume that we have independent simple random samples from each group and that the groups are normally distributed. (a) What is the appropriate test to use? (b) What are the null and alternative hypotheses? (c) What is the distribution of the test statistic?arrow_forward2. In a population it is estimated that 20% have a desired trait of interest for the researcher. The researcher wants to know how many people on average he has to draw from a population to get 2 people with the trait. Use rows 20-24 of the Random Number Table to carry out the simulation. Explain clearly how you set up the problem and report your findings. Answer:arrow_forwardConsider the sample space for making random guesses on a 3 question true/false exam. {TTT TTF TFT FTT FFT FTF TFF FFF} What is the probability that the list of random guesses will contain 2 "T" guesses and a single "F" guess?arrow_forward
- An experiment consists of drawing two numbers out of a hat one after the other containing the numbers 1, 3, 5, 6. The two numbers are then recorded as a 2-digit number. The number drawn is NOT put back in the hat before drawing the second. Do the following: List the sample space.________________________________ Let F = the event of getting a number whose first digit is odd Let S = the event of getting a multiple of 6 Find P( F and S) =____________________________________ Find P(F) =______________________________ Find P(F|S) =_______________________________________ Are F and S independent events? ___________Justify_____________ VIII (15) Let E be the event that at least two people out of 4 have the same birth month (not day). How many outcomes in the Sample space. In other words, compute n(S).________ State in words the complement of E. _____________________________ How many outcomes in the event not E. In other words, compute n(not E). ________…arrow_forwardWhich of these best represents the sample space associated with selecting two coins at random with replacement from a bag containing 2 dimes, 1 nickel, and 1 penny? d, d, n, p A d-d, d-n, d-p, В n-d, n-p, p-d, p-n d-d, d-n, d-p, n-d, n-n, n-p, p-d, p-n, p-p d-d, d-d, d-n, d-p, d-d, d-d, d-n, d-p, n-d, n-d, n-n, n-p, D p-d, p-d, p-n, p-parrow_forwardK In a large clinical trial, 395,956 children were randomly assigned to two groups. The treatment group consisted of 198,649 children given a vaccine for a certain disease, and 27 of those children developed the disease. The other 197,307 children were given a placebo, and 107 of those children developed the disease. Consider the vaccine treatment group to be the first sample. Identify the values of n₁. P₁, 9₁. n2. P2, 92, P. and q. n₁ 11arrow_forward
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- A First Course in Probability (10th Edition)ProbabilityISBN:9780134753119Author:Sheldon RossPublisher:PEARSON
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ISBN:9780134753119
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