Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Textbook Question
Chapter 17, Problem 40E
TV ads A start-up company is about to market a new computer printer. It decides to gamble by running commercials during the Super Bowl. The company hopes that name recognition will be worth the high cost of the ads. The goal of the company is that over 40% of the public recognize its brand name and associate it with computer equipment. The day after the game, a pollster contacts 420 randomly chosen adults and finds that 181 of them know that this company manufactures printers. Would you recommend that the company continue to advertise during Super Bowls? Explain.
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Shenise is a star player for her women's basketball team. She has injured her ankle, and it is doubtful that she will be able to play in an upcoming game. If Shenise can play, the coach estimates that the team will score 91 points. If Shenise is not able to play, the coach estimates that they will score 70 points. The team doctor estimates that there is a 70% chance Shenise will play. Determine the number of points the team can expect to score.
A business magazine mailed a questionnaire to the treasurers of all of the Top 400 most profitable companies, and received responses from 22% of them. Those responding reported that they did not find that such surveys intruded significantly on their workday.
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the proportion of those responding that said they did not find that such surveys intruded significantly on their workday.
Joe likes to go to an old arcade and play 12 games of Skeeball every day. On average, he wins a prize on 55% of the games he plays. Today, however, he won only 4 of the 12 games he played.This made Joe think that there must be something wrong with how he is throwing the ball today. However, a friend tells him, "You might be throwing the same way you usually do. People will sometimes have a group of bad games just because of random variation, not because of psychology, or because they are doing anything differently, or any other reason. For someone with your statistics, such random bad days wouldn't even be very rare."Let's see what Joe's friend means. Suppose that Joe's skill level really hasn't changed, so he still has a 55% chance of winning each game he plays, like before. If he plays 12 games a day, on what percentage of days will he win 4 games or fewer? Assume that each game is independent of the others.
Chapter 17 Solutions
Intro Stats
Ch. 17.2 - A research team wants to know if aspirin helps to...Ch. 17.2 - An allergy drug has been tested and found to give...Ch. 17.2 - The new drug is tested and the P-value is 0.0001....Ch. 17.4 - Prob. 4JCCh. 17.4 - Prob. 5JCCh. 17.4 - Prob. 6JCCh. 17 - Prob. 1ECh. 17 - Prob. 2ECh. 17 - Prob. 3ECh. 17 - Prob. 4E
Ch. 17 - SECTION 15.3 7. Hispanic origin According to the...Ch. 17 - Empty houses According to the 2010 Census, 11.4%...Ch. 17 - Prob. 7ECh. 17 - Prob. 8ECh. 17 - Prob. 9ECh. 17 - Prob. 10ECh. 17 - CHAPTER EXERCISES 15. Hypotheses Write the null...Ch. 17 - More hypotheses Write the null and alternative...Ch. 17 - Negatives After the political ad campaign...Ch. 17 - Dice The seller of a loaded die claims that it...Ch. 17 - Prob. 15ECh. 17 - Cars A survey investigating whether the proportion...Ch. 17 - Prob. 17ECh. 17 - Prob. 18ECh. 17 - Prob. 19ECh. 17 - Prob. 20ECh. 17 - Dowsing In a rural area, only about 30% of the...Ch. 17 - Abnormalities In the 1980s, it was generally...Ch. 17 - Prob. 23ECh. 17 - Educated mothers The National Center for Education...Ch. 17 - 25. Contributions, please, part II In Exercise 23...Ch. 17 - 26. Take the offer, part II In Exercise 24 of...Ch. 17 - 27. Law school 2007 According to the Law School...Ch. 17 - Prob. 28ECh. 17 - Prob. 29ECh. 17 - Scratch and dent An appliance manufacturer...Ch. 17 - Prob. 31ECh. 17 - Prob. 32ECh. 17 - WebZine A magazine is considering the launch of an...Ch. 17 - Seeds A garden center wants to store leftover...Ch. 17 - Prob. 35ECh. 17 - Prob. 36ECh. 17 - Prob. 37ECh. 17 - Acid rain A study of the effects of acid rain on...Ch. 17 - Prob. 39ECh. 17 - TV ads A start-up company is about to market a new...Ch. 17 - Prob. 41ECh. 17 - Prob. 42E
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- ten percent of adults say oatmeal is their favorite cookie. You randomly select 12 adults and aks each to name his or her favorite cookie. find the probaility that the number who say oatmeal raisin is their favorite cookie is exactly four.arrow_forwardFarmer Joon must determine whether to plant corn or wheat. If heplants corn and the weather is warm, he earns $9,000; if he plants corn and the weather is cold,he earns $6,000. If he plants wheat and the weather is warm, he earns $7,000; if he plants wheatand the weather is cold, he earns $6,500. In the past, 40% of all years have been cold and 60%have been warm. Before planting, Joon can ask an expert for a weather forecast. If the year isactually a cold, there is a 90% chance that the forecaster will predict a cold year. If the year isactually warm, there is an 80% chance that the forecaster will predict a warm year.d. What is the probability that the year will be actually cold if the expert said: “will be warm”?e. If the expert said “will be cold”, then which crop do we plant this year? Please answer this. I NEED THIS..THISarrow_forwardJoe likes to go to an old arcade and play 10 games of Skeeball every day. On average, he wins a prize on 56% of the games he plays. Today, however, he won only 3 of the 10 games he played. This made Joe think that there must be something wrong with how he is throwing the ball today. However, a friend tells him, "You might be throwing the same way you usually do. People will sometimes have a group of bad games just because of random variation, not because of psychology, or because they are doing anything differently, or any other reason. For someone with your statistics, such random bad days wouldn't even be very rare." Let's see what Joe's friend means. Suppose that Joe's skill level really hasn't changed, so he still has a 56% chance of winning each game he plays, like before. If he plays 10 games a day, on what percentage of days will he win 3 games or fewer? Assume that each game is independent of the others. Fill in the blank: Joe would win 3 games or fewer on % of the days that he…arrow_forward
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