a pollster plans to improve survey results by only conducting polls in which the margin of error is zero, does this make sense?

Q: A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in…

A: It is given that the population proportion (prevalence) is 0.397. It is known that the critical…

Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

Q: Felicia is conducting a survey to determine the determine the favorite TV show among her community.…

A: Stratified sampling: In stratified sampling the whole population is divided into two or more…

Q: Suppose that the results of a survey show that 41% of people consider summer as their favorite…

A: Solution: The sample size formula is given as below: n = p*q*(Z/E)^2 We are given p = 0.41 q = 1 – p…

Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A: There are 153 out of 360 (n) elementary school children found as above grade level readers. The…

Q: Is there enough variation in the value people place on health for it to be included in value…

A: Value Surveys: The value surveys is a tool for improving the quality, standards, improving customer…

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: Explain the consequences of failing to properly account for multiple comparisons

A: Multiple comparisons tests (MCTs) are performed several times on the mean of experimental…

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

A:

Q: An industrial/organizational psychologist wants to improve worker productivity for a client firm,…

A: The following information is given: n=250,  M=9,  s=10.4 Let X denote the number of hours legal…

Q: One day, a poll appeared on a certain website. It asked "Do you believe that rain can soothe the…

A: we wants to calculate the margin of error . let us consider level of significance =0.05 this is one…

Q: A random sample of 2,000 driver's license applications found that 17% reported their eye color as…

A: Solution: Given information: n= 2000 Sample size  p^= 0.17 Sample proportion Assumed Confidence…

Q: If the sociologist can sample 100 women, what will the margin of error be?

A:

Q: Is it possible to provide a meaningful interpretation of the estimate b0?

A: The independent variables are 'weekly income x1' and 'family sizex2' and the dependent variable (y)…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample isneeded in…

A:

Q: In October 2017, the Gallup Poll asked a sample of 10281028 U.S. adults, "Are you in favor of the…

A: Given, n=1028 Consider that the population standard deviation is σ, the level of significance is α.…

Q: A company wants to know the proportion of consumers willing to buy their product. How many people…

A: Given that ME=margin of error=1.5%=0.015z=critical value off 90% confidence…

Q: A manager at e-Bay wants to determine the current percentage of U.S. adults who now use the…

A: Obtain the sample size of a preliminary estimate for p is 0.73 The formula of sample size is, Use…

Q: Find the number of respondents needed in a poll to determine, within 1.5% margin of error, the…

A: The answer is attached below,

Q: In an Adecco staffing survey of 1000, adults in the US, 140 said the salary was the most important…

A: From the provided information, The sample size is 1000 which is sufficiently large and out of which…

Q: When taking a 28 question multiple choice test, where each question has five possible answers, it…

A: Given data when taking a 28 question multiple choice test where each question has five possible…

Q: Suppose that the results of a survey show that 35% of people consider summer as their favorite…

A: Critical value: Using the z-table, the critical value at 95% confidence level is

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: What is Margin of Error?

A: Margin of error: The margin of error is defined as a statistic that gives the amount of sampling…

Q: What is an outlier?

A: We have to describe the outlier. Outlier can be present in any dataset.

Q: The head of a computer science department is interested in estimating the proportion of students…

A: Given: Margin of error E = 0.04 Significance level α = 0.05 The critical value Zα/2=Z0.05/2=1.96 The…

Q: Gap, Express, Zara, and America Online are just a few of the many companies interested in knowing…

A:

Q: I want to be sure to obtain a margin of error of ±5 % in a poll asking whether people support…

A: Given information: Margin of Error=+/-5%=0.05 Let level of significance=0.05 Let the proportion of…

Q: How can you tell if a coin is fair?

A: We have given that If a coin is fair

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: What is the margin of error associated with a survey of 1034 college students if we want to be 97%…

A:

Q: If we wanted a random sample of students in a cafeteria, why couldn't we just take the students who…

A: Answer: Here random word itself says that we couldn't just take the students who order coke with…

Q: Does it make sense ? Why or why not? A pollster plans to improve survey results by only conducting…

A: A pollster plans to improve survey results by conducting polls in which the margin of error is zero.

Q: recent poll reports that between 53% and 59% of voters will vote for president george in the next…

A: The confidence interval is (53%, 59%).

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 recent polls show that 61% of adult Americans are comfortable with the legalization of marijuana,…

A:

Q: A group of researchers want to investigate the academic performance of the college students in…

A: Given that, N = 12000 Margin of error (e) = 0.05 The formula for calculating the sample size is,

Q: A researcher plans to conduct a survey. If the population on High City is 1,000,000 find the sample…

A: To calculate the sample size (n) given the population size (N) and a margin of error (e), we use…

Q: If the median house price is $1.9m, does that necessarily mean that half of the houses on the block…

A: Median refers to the middle value that divides the whole data in two equal to parts lower half and…

Q: Suppose that the results of a survey show that 41% of people consider summer as their favorite…

A:

Q: Find out if illiteracy and criminality are associated or independent by using the Proportion Method.

A: The given data can be described as   Criminal  Not criminal Total Literates 8 (AB) 707 (Aβ) 715…

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A:

Q: In a Gallup poll of 1236 adult respondents, 6% said that bad luck follows breaking a mirror. That…

A: The margin of error expresses the amount of the random variation underlying a survey's results

Q: If a survey of a movie shows that 50% of all people who like the movie, enjoyed the official movie…

A: Introduction: Population of interest: The population of interest includes all the individuals of…

Q: According to the results of a survey, 40% of 396 Leople indicated that American football is their…

A: Given Data: p^=0.4   Margin of error=0.04   Assuming significance level of 0.05 z0.05/2=1.96

Q: Suppose that the results of a survey show that 40% of people consider summer as their favorite…

A: Given Data: Let 'n' be sample size p^=0.4 Margin of error=0.04   Assuming level of significance to…

Q: time a 10-year-old American child spends playing outdoors per day is between 19.28 and 24.08…

A: Given Data Lower limit = 19.28 upper limit = 24.08

Q: Suppose that the results of a survey show that 28% of people consider summer as their favorite…

A: Given Data: p^=0.28 Let 'n' be the random sample Margin or error=0.06   Let us assume level of…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.