A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of ±3% with 99% confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample? Round your answer up to the nearest integer. sample size = Enter your answer in accordance to the question statement

Q: Advertisers contract with Internet service providers and search engines to place ads on websites.…

A: Given:  38% of advertisers have been a victim of click fraud. Sample size=n=420.

Q: The use of the Internet is constantly growing. How many randomly selected adults must be surveyed to…

A: Solution

Q: In Exercises 29–32, indicate whether the observational study used is cross-sectional, retrospective,…

A: Cross sectional study:If the data points are collected by observing the objects at certain point of…

Q: In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: Let A be the event that student had Math SAT of 700 or more Therefore, PA=0.36 find The probability…

Q: Advertisers contract with Internet service providers and search engines to place ads on websites.…

A: Given data is appropriate for z-test for single proportion . because it is a large sample…

Q: A study published in 2007 attempted to estimate the proportion of Florida residents who were willing…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of a population…

Q: How many adults must be surveyed in order to be 95% confident that the sample percentage is in error…

A:

Q: When choosing an item from a group, researchers have shown that an important factor influencing…

A: Note:Hey, since there is multiple question posted, we will answer first question. If you want any…

Q: A hot topic of debate is whether the legal driving age should be raised to eighteen. From a random…

A: It is tested whether majority of the Americans believe the legal driving age should be raised to 18.…

Q: TV advertising agencies face increasing challenges inreaching audience members because viewing TV…

A: a.

Q: In Exercises 21–24, refer to the data in the table below. The entries are white blood cell counts…

A: Correlation:Correlation determines the size and direction of the relationship between the two…

Q: In nursing, we seldom know the true values or percentages of many illnesses or syndromes. For…

A: The confidence interval is used to get an interval in which the population parameter (unknown) is…

Q: following contains 30 data values of the variable TV randomly selected from the StudentSurvey…

A:

Q: 13. Market research statistics show that 39% of U.S. households own dogs, 34% own cats and 23% own…

A:

Q: Advertisers contract with Internet service providers and search engines to place ads on websites.…

A: Refer Standard normal table/Z-table to find the probability of z=0.63 & z=-0.63.

Q: air travelers now use e-tickets. Electronic ticketing allows passengers to not worry about a paper…

A: Denote μ as the population mean number of complaints per airport.

Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

A:

Q: 3. A political scientist would like to estimate the proportion of voters who read their ballot…

A: To calculate: How large of a sample size does she need?

Q: versity is trying to determine how many of their students have watched a bystander intervention…

A: Given: Total number of students = 3500 Number of students included in the survey = 1050 Percentage…

Q: In 2010, some researchers with the Pew Internet & American Life project interviewed a random sample…

A: In statistical inference, there are two types of estimation,  Point estimation and Interval…

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: Kai'Sa is doing her best to maintain her figure by following a strict calorie counting process.…

A: Given data Hypothesized mean µ= 370 Sample mean = 383 Sample Standard deviation s = 70 n = 60…

Q: In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism…

A:

Q: A survey of 15,000 American adults in 2011 found that 35.3% identify as Democrats and 34.0% identify…

A: we have to find the 99% confidence level margin of errors for the estimate for the proportion of…

Q: 5 An economist believes that the average annual income of men and women are the same in the United…

A: Given An economist believe that the average annual income of men and women is the same in the united…

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: compute sample size ( n ) = n=(Z/E)^2*p*(1-p)

Q: The objective of a community research project is to determine whether women are more community…

A: a) Significance level is 0.05. n = 9 D.F = n - 1 D.F = 9 - 1 D.F = 8 Determine the critical value…

Q: 3. A Gallup poll conducted in 2010 found that 494 of 1050 adult Americans believe it is the…

A: Given that  Sample size n =1050 Favorable cases x =494 Sample proportion p^=x/n  =494/1050 =0.4705

Q: In Exercises 1–4, use these results from a USA Today survey in which 510 people chose to respond to…

A: a)The “percentage” or “%” represents “divided by 100”.

Q: 19 2. How can you tell whether a greater percent of customers surveyed selected veggie burger or…

A:

Q: In Exercises 21–24, refer to the data in the table below. The entries are white blood cell counts…

A: No. It does not make sense to use the difference between each white blood cell count and the…

Q: What percentage of the population live in their state of birth? According to the U.S. Census…

A:

Q: . An introductory stats professor hypothesizes that 50% of students learn best by watching the…

A: Test is that whether distribution of students is such that 50% of students learn best by watching…

Q: Suppose you took a survey designed to assess criminal justice students and their attitudes towards…

A: Variables are classified according to their purpose in a research.

Q: A pollster wishes to estimate the true proportion of US voters who oppose capital punishment. How…

A: Given information Error = 3.5% = 0.035 Confidence level = 0.90

Q: To determine the BEST prediction of the number of electric cars that will be sold in 2022 based on…

A: Given, Years since 2010 cars sold 1 17763 4 118882 7 195581 9 326644

Q: According to the ACT Profile Report-National, the ACT composite scores are normally distributed with…

A: The provided sample mean is x̄  = 19.8 and the known population standard deviation is σ = 5.4,and…

Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…

A: Given  pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20

Q: 5. A study attempted to estimate the proportion of Florida residents who were willing to spend more…

A: Population: Population consists of the complete subjects that are included in the study for making…

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: An economist predicts that in the next 50 years gas will be 0.02 based on the last 7 months of 2015.…

A: Introduction: It is required to identify the type of error that has been made in the conclusion.

Q: According to the ACT Profile Report-National, the ACT composite scores are normally distributed with…

A: The provided sample mean is x̄  = 19.8 and the known population standard deviation is σ = 5.4,and…

Q: Q-3 A University conducted a survey of its recent graduates to collect demographic and health…

A: The Chi-Square Test of Independence determines whether there is an association between categorical…

Q: A recent poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: GIVEN age =18 the respondents= 80%=0.8

Q: In Exercises 5–8, determine whether the given source has the potential to create a bias in a…

A: Bias:Bias is the state where subjects would be favorable to certain events or things. Bias prevents…

Q: In Exercises 5–8, determine whether the given source has the potential to create a bias in a…

A: The researchers have collected the data about the 10 pair monozygotic (identical) twins from Harvard…

Q: Chapter 9. 6)A poll surveyed 341 video gamers, and 81 of them said that they prefer playing games on…

A: The provided information are:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.