26) A survey for brand recognition is done and it is determined that 68% of consumers have heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups of 800, would it be unusual to get 530 consumers who recognize the Dull Computer Company name? 26) A) Yes B) No

26) A survey for brand recognition is done and it is determined that 68% of consumers have heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups of 800, would it be unusual to get 530 consumers who recognize the Dull Computer Company name? 26) A) Yes B) No

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...

See similar textbooks

Similar questions

5) A sample of professors is selected and it is found that 25% own a vehicle. Which is true about the above statement? a) It is a statistic because the value is a numerical measurement describing a characteristic of the population. b) It is a parameter because the value is a numerical measurement describing a characteristic of a sample. c) It is a parameter because the value is a numerical measurement describing a characteristic of a population d) It is a statistic because the value is a numerical measurement describing a characteristic of a sample.
Q1) Below find the records of 12 randomly selected used pickup trucks (none used commercially) and 11 randomly selected used passenger cars, the time (in years) that they were kept by the original owner before being sold: Used pickup trucks | 3 | 2.5 2.9 5 4.2 3.1 3.3 4 5.3 3.8 4.5 Used passenger cars | 2.2 3 2.8 4.3 4 3.3 2.9 2.1 2 3.1 3 It is known that the standard deviation of used pickup trucks is 2 years and of used passenger cars is 1 year. (a) Investigate, at the 5% significant level, whether the mean time (in years) that used pickup trucks were kept by the original owner before sold is larger than used passenger cars. (b) What assumption is needed to perform the test in (a). (c) Construct the 96% confidence interval for the mean difference of time (in years) were kept by the original owner before sold between used passenger cars and used pickup trucks. Use this confidence interval to tell whether there is difference in the mean time (in years) between these 2 tynes of…
5. A Senator wants to know what the voters of his state think of proposed legislation on gun control. He mails a questionnaire on the subject to an SRS of 2500 voters in his state. His staff reports that 448 questionnaires have been returned, of which 343 support the legislation. This is an example of A) a survey with little bias because a large SRS was used. B) a survey with serious nonresponse. C) a survey with little bias because it was the voters who elected the senator. D) a survey with serious undercoverage. E) a survey that provides little evidence about the level of support for the legislation F) A and B G) B and E H) B and D I) A and C
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than five percentage points question mark a) Assume that nothing is known about the percentage of computers with new operating systems. (Round up to the nearest integer.) b) Assume that a recent survey suggests that about 92% of computers use a new operating system. (Round up to the nearest integer.)
A skin patch contains a new drug to help people quit smoking. A group of 75 cigarette smokers have volunteered as subjects to test the new skin patch. For one month, 40 of the volunteers receive skin patches with the new drug. The other volunteers receive skin patches with no drugs. At the end of the two months, each subject is surveyed regarding his or her current smoking habits. (Select all that apply.) a) No placebo is being used.b) Then record the smoking habits of all volunteers to see if a difference exists between the two groups.c) Then record the smoking habits of the 40 volunteers to see if a difference exists between the two groups.d) Use random selection to pick 40 volunteers for the skin patch with the drug.e) Use random selection to pick 35 volunteers for the skin patch with the drug.f) A placebo patch is used for the remaining 35 volunteers in the second group.g) Then record the smoking habits of the 35 volunteers to see if a difference exists between the two groups.
3. Number of Responses 800 600 JE 400- 200- 0+ Not at all likely Very unlikely Unlikely Neutral A) mode = 3 B) median = 3 C) mean < median D) 2 < mean < 5 Likely Very likely Response Definitely 4. Liam is conducting a market research study to determine the effectiveness of advertisements on social networking sites. He surveyed a randomly selected group of 2,000 young adults on how likely they are to purchase from a company based on its advertisements on social networking sites. Respondents rated their likelihood to purchase on a scale from 1 to 7, with 1 being "Not at all likely" and 7 being "Definitely." The results are summarized in the bar graph above. Which of the following state- ments is NOT true based on the survey results?
26) A phycologist is interested in determining the proportion of algae samples from a local rivulet that belonged to a particular phylum. A random sample of 50 algae was obtained and each alga was categorized as either being cyanobacteria or not. It was found that 38 were, in fact, cyanobacteria. a) The proportion p that was cyanobacteria isA. 38B. 0.38C. 0.5D. 0.76E. 50 b) (Continue from the previous question),What is the standard error of the proportion p, i.e. S.E.(p), that were cyanobacteriaisA. 0.0036B. 0.0604C. 0.0684D. 0.1824E. None of the above
Your group is expected to interview at least 40 random persons about their preference for shopping online and whether they would be interested in such services. Record the following for each respondent: Age Gender Whether they go shopping at the supermarket/pharmacy. How many times they shop at the supermarket/pharmacy per month. Would they be interested in purchasing items from the supermarket/pharmacy online or through a mobile application? Would they be willing to pay a subscription fee to utilize this service? If yes what is the maximum fee that they would be willing to pay. The amount of money they are willing to pay to have the goods delivered to them. In the absence of a subscription fee or delivery fee, would they be willing to pay a marginally higher price for the good purchased online? If yes, what percentage would be reasonable [group in the following way: less than 1% higher, 1% - 5% higher, over 5% higher] Respondent Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 1 28 F YES 3 NO NO $5…
A poll of 120 city residents found that 30 had visited the new museum, and that 80 had been to the new park. If it appeared that going to the park and going to the museum were independent events, how many of those polled had been to both? Park O 20 O 15 Museum Yes No Total Hint: P(went to park and went to museum) divided by total people surveyed O 10 Yes ?? No 80 40 Total 30 90 120 OIt cannot be determined.
9. In order to investigate a rumor that there is a greater than expected number of girls among the children of chemists, Science magazine conducted an informal survey of eight chemistry departments. A secretary in the chemistry department at Indiana University, Bloomington, thought there might be something to this rumor and made sure that every one of the 34 faculty members in her department who have children responded to the Science survey. Altogether these Indiana chemists have 53 (56%) girls and 41 (44%) boys. Is this evidence that chemists produce more girl babies than expected? What kind of data would you prefer before drawing this type of conclusion? Explain how your idea would make the evidence produced more convincing.
I need help on these questions. The table is attached. Use Table B, starting at line 119, to choose the first 5 drivers in the sample. Drag the token representing the label of the driver selected to the appropriate column. (b) One question asked was, “Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?” Of the 880 respondents, 171 admitted that at least one light had been red. A practical problem with this survey is that people may not give truthful answers. What is the likely direction of the bias: do you think more or fewer than 171 of the 880 respondents really ran a red light? A) Fewer than 171 of the 880 respondents really ran a red light. B) More than 171 of the 880 respondents really ran a red light. Why would there be such a bias? A) The test suffers from sample bias. B) People may be concerned that they will get in trouble if they admit to running red lights. C) Those…
a) There are 62 million Americans who speak a language other than English at home. Thelanguages are Spanish, Chinese Tagalog (Philippines language), Vietnamese, French,Korean, and others. Suppose that one of these individuals is selected at random. Use setnotation to list the sample space.b) The numbers (in millions) of Americans speaking non-English languages at homeare listed next.Language Spoken at Home Millions of AmericansSpanish 38.4Chinese 3.0Tagalog 1.6Vietnamese 1.4French 1.3Korean 1.1Other 15.2If one individual is selected at random find the probability of the following events.i. Individual speaks Spanish.ii. Individual speaks a language other than Spanishiii. Individual speaks Vietnamese or Frenchiv. Individual speaks one of the other languages.