According to The Census Bureau, 60% of adults buy clothing online. a) How many adults did they surveyed in order to be confident that the sample proportion is in error by no more than three percentage points. b) What about if they did not have prior knowledge of the sample proportion, How many adults would they need to survey?

Q: Identify the sample space for a couple having four children.

A:

Q: Which survey question is biased? O a) Does the media impact politics? O b) Is eating fruit good for…

A: A leading question prompts the respondent to answer in a particular way. Leading questions are…

Q: Students at Neilson Middle School are asked if they prefer watching television or listening to the…

A: Given that, The total number of students at Neilson Middle School is 150. The number of students,…

Q: 3. The front row of a movie theatre has 23 seats. If you were asked to sit in the seat that occupied…

A:

Q: If we have a statistical community with only six vocabulary, and you need to choose a sample of only…

A: Given that, in a statistical community there are six vocabulary and we need to choose three sample…

Q: The International Brotherhood of Slide Whistlers wants to conduct a survey to find what proportion…

A: Let COnfidence interval be 90% Zc=1.645 E=3%=0.03 p=0.5 n=?

Q: Out of 45 students, 29 go on a field trip. Which best represents the percent of the students who do…

A:

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the…

A: From the given information, The sample size is 100 viewers. Among 100 viewers, 36% indicated that…

Q: 37. Whatis the proportion of single women among those who are 30-44 years old? 38. Of the to tal…

A: The following information can be obtained from the table: Number of single women who are 30-44 years…

Q: When 3,011 adults were surveyed in a Pew Research Center poll, 73% said that they use the internet.…

A: Given Information: n = 3011 ¾ of all adults use the internet (p)  = 75% = 0.75   = 73% = 0.73 Step…

Q: 13. If 27 out of 30 people passed a driving test, what percent failed?

A: Given Total people = 30 Passed people= 27 So ,failed people= 30-27 = 3

Q: (a) How large should the sample be if the margin of error is to be less than $4? ANSWER: (b) If we…

A: here given , Population standard deviation  =  34$  Confidence level = 90%  MOE < 4 $

Q: Which types of car were driven by more than 623 respondents in the survey?

A: Here use proportion from given pie chart And calculate no of people drive that type of car

Q: Can you think of an area where it might not be practical, for a variety of reasons, to sample 100%…

A: Given:- We can think of an area where it might be practical, for a variety of reasons ,to sample…

Q: A research report from an independent-measures study states that there are significant differences…

A: It is given that the numerator (treatments) degrees of freedom is 2 and the denominator (error)…

Q: In a sample of 508 men who worked at home, 32% of them were college graduates. a.) Among the 508 men…

A:

Q: A survey of 150 people revealed that 115 people like ketchup on their hot dogs, 85 people like…

A: Concept of General Addition Rule: For any two events A and B the General Addition Rule state that:

Q: In a pie graph, if the blood type B represents 35% of the distribution, how many degrees would be…

A: Given information: It was stated that in a pie graph, blood type B represents 35%. Then need to find…

Q: If a researcher measures two individuals on a ratio scale, then it is impossible to determine how…

A: Ratio scale is a form of quantitative variable measurement scale. Ratio scale makes it possible for…

Q: Suppose that in a group of 800 women, the percentage who work is the same as in the sample here, how…

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131

Q: A research report from an independent-measures study states that there are significant difference…

A: From the provided information, The degree of freedom for treatment (k – 1) = 3 A) The required…

Q: Say that there are five populations, and we need to test for difference of population means.  If we…

A: Say that there are five populations, and we need to test for difference of population means. We test…

Q: Although Nielsen Media research determined the precise proportion of all Americans watching the…

A: Given : Nielsen Media research determined the precise proportion of all Americans watching the super…

Q: A survey of 800 nurses yielded the following information: 430 were health club members, 575 were…

A: Number of nurses in a survey = 800 Number of health club members = 430 Number of smokers = 575…

Q: Identify the response variable and whether the sitting involved 1. A single sample, 2.Marched pairs,…

A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Q: In a sequential sampling plan, the first, second, third and fourth units are good, good, defective,…

A: answer is explained below

Q: A survey of 800 nurses yielded the following information: 430 were health club members, 555 were…

A: Given data, Total number of nurses=800 in which Health club member nurses =430 Smokers nurses =555…

Q: estimate the sample size for a population of 750 people.

A: To estimate the sample size the required calculation can be defined by the formula  Slovin's…

Q: If the proportion of Heads is .45 out of 200 flips, what is the p-value?

A: The proportion of Heads is .45 out of 200 flips.

Q: A medical researcher wants to do a study on the proportion of knee replacement surgeries that result…

A:

Q: In hypothesis testing, what is the level of significance?

A:

Q: When calculating the sample size for a research study, a researcher should always round the final…

A: The statement is true.

Q: As a manufacturer of golf equipment, the Spalding Corporation wants to estimate the proportion of…

A: From the provided information, Margin of error (E) = 0.025 Confidence level = 99% Assuming the…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A: Given, 1 - α = 0.98ME =margin of error = 3% = 0.03To find the sample size is needed?

Q: Can you think of an area where it might not be practical, for a variety of reasons, to sample 100%…

A: Yes, there are several areas where we cannot sample 100% of the population being covered to test.

Q: What does it mean to say the race was too close to call?

A: Here Given  Proportion vote A would receive = PA=0.46 Proportion vote B would receive=PB=0.44…

Q: A geography student in Parkville, Missouri is conducting a housing survey, including questions about…

A: It is given that she knows that about 38% of the people in Parkville live in apartments, and wants…

Q: If there are 11 data points in a set of data, what is the number of degrees of freedom? (Enter an…

A: We have to find out degree of freedom..

Q: If there are 41 data points in a set of data, what is the number of degrees of freedom? (Enter an…

A:

Q: If 31 out of 50 students sampled live in a college dormitory, what is the estimated proportion of…

A:

Q: If there are six groups being compared, how many mean comparisons will there be?

A: Given there are six groups.Here, it is required to find the total number of comparisons.

Q: a) What proportion of workers answered yes to the survey? b) What was the margin of error?

A: Here, the 95% confidence interval for the proportion of workers that answered 'yes' is (0.62, 0.73).…

Q: If six out of every eleven trick-or-treaters that came to your house last Halloween were dressed as…

A: Given, Dressed as witches [ trick-or-treaters that came to your house last Halloween]= 6/11

Q: How large a sample is needed

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.01 The critical value is ,…

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Given,margin of error(E)=0.04Let us assume sample…

Q: Suppose that the result of a public opinion poll shows that just 10% of people would be willing to…

A:

Q: If the proportion of Hs is .45 out of 50 flips, what is the p-value? Round to three places.

A: We have given that Sample proportion =0.45 Sample size (n)=50 flips  Population proportion p=0.5…

Q: What is the sample proportion

A: Claim: More than half of the population believes that passwords should be replaced with biometric…

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

Q: Discuss the four different sampling methods, and for each method, explain why we might use it.

A: Here we need to discuss four different types of sampling methods with their uses.

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.