A researcher at a major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 4%? OA 1037 OB. 17 OC 2073 O0. 849

Q: hen creating a 99% CI based on data from one sample the size of n=31, which t value should be used?

A: Given: n=31 The degree of freedom=n-1=31-1=30 The level of significance (α)=0.01 We see inside the…

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

A: Margin of error: It is the vary of values below and higher than the sample data point in a…

Q: Suppose that we want to estimate what percentage of all drivers exceed the 50 km/h speed limit on a…

A: Sample size for know proportion;n=p^(1-p^)zα2E2Sample size for unknow proportion;n=14zα2E2

Q: '. By how much must the sample size n be increased if the width of the CI (7.5) is to be halveď? If…

A: The formula for calculating the sample size in terms of width of the confidence interval

Q: A Pew Research study estimates that 803 million people live in poverty today, after the 2020 global…

A: It is given that 803,000,000 people live in poverty today, out of 7,754,000,000 people worldwide.

Q: A sample of size 80 which found to contain 21 smokers. What is the sample proportion of non-smokers…

A: A population is the complete set of elements for which the study or experiment is conducted. A…

Q: Do teachers find their work rewarding and satisfying? An article reports the results of a survey of…

A: Let pelementary denotes the population proportion of all elementary school teachers who are…

Q: A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable…

A: Given information- We have given that in a survey of 2310 adults in a certain large country aged 18…

Q: A local college recently made the news by offering foreign language-speaking dorms to its students.…

A:

Q: A recent survey found that 68.6% ofthe population own their homes. In a random sample of180 heads of…

A:

Q: 14) A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A:

Q: A survey is conducted to determine the opinions of people on global warming. In a random sample of…

A:

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

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: Suppose the U.S. president wants to estimate the proportion of the population that supports his…

A: Critical value: The value of α is 0.05 for 95% confidence level. Using excel formula…

Q: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A:

Q: Male penguins that weigh more than 4710 grams are considered "desirable" because the extra fat means…

A: We need to find expected value of desirable penguins Let us find out probability of a desirable…

Q: A quality-conscious disk manufacturer wishes to knoww the fraction of disks his company makes which…

A: Given, The no. of sample, n =5431 The number of defective, x = 4943

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: Using the data, estimate the proportion of this that are defective.

A: Here given A quality conscious disc manufacturer wishes to know the fraction of disks his company…

Q: From a sample of 500 items, 30 were found to be defective. The point estimate of the population…

A: The point estimate of the population proportion is the sample proportion. The formula for point…

Q: The National Technology Readiness Survey sponsored by the Smith School of Business at the University…

A: Denote p2009 and p2004 as the true population proportions of spam emails deleted by Americans in…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: # Given: no of favourable cases x=321    total no of cases n=1432  then to find sample proportion…

Q: Compute the sample proportion \hat pp^​ of voters who think the state of the economy is the most…

A: It is given that Sample size n = 2000 Number of voters who think the state of the economy is the…

Q: A November 2018 Gallup Poll of 1075 U.S. adults found that 627 are satisfied with the total cost…

A:

Q: The Canine Gourmet Company produces delicious dog treats for canines with discriminating tastes.…

A: From the given information, Process average weight per packet is 41 grams. That is, x¯¯=41 The…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n   Where 'E' is the…

Q: In a random survey of 1500 adults in California and 1000 adults in Oregon, you found that 228…

A: Given that

Q: As the newly hired manager of a company that provides cell phone service, you want to determine the…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Let p1 denotes the population proportion of adults in Country A who favor building new nuclear power…

Q: determine the standardized test statistic,z to test the claim about the population proportion…

A:

Q: Suppose you wish to estimate a population mean based on a random sample of n observations, and prior…

A: The population standard deviation is 12.7, the margin of error is 1.6 and probability(or confidence…

Q: What sample size n is required in order to be 95% confident that our sample proportion is within…

A:

Q: The theater owner wants to sample 250 customers out of the 3500 in attendance. This will be a 1 in k…

A: Population is the set of all objects of interest. Sample is s subset of the population. It is not…

Q: A quality-control inspector examined 210 calculators and found 13 of them to be defective. At this…

A:

Q: ple of 1000 Americans, it was discovered that 920 of them lived in neighborhoods with acceptable…

A: The point estimate (sample proportion) of the sample of size n can be defined as: p^=xn  Here, x =…

Q: In a survey of a random sample of 1,500 residents aged 25 years or older from a particular county,…

A: We solve this question just by using some logic and basic arithmetic. The definition and use of…

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Margin of Error ME= 0.06 Confidence level c= 0.90

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A:

Q: In recent years, approximately 55% of eligible voters take the time to vote in presidential…

A: Givensample size(n)=200x=128α=0.05

Q: A state highway patrol official wishes to estimate the number of  legally intoxicated    drivers on…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.99.

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Confidence level = 0.95, margin of error = E = 0.08.

Q: A survey of 120 fatal accidents showed that in 24 cases the driver at fault was inadequately…

A: Point estimate:   The population parameter which is estimated by using sample statistic is termed as…

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

A: From the provided information, Study indicates that proportion of left-handed scientists is 9% that…

Q: A soft drink manufacturer wants to determine the proportion of its soda cans that meet quality…

A: The sample size n= 2000 cans. He finds that 99.7% meet the quality standards.

Q: If you want to be 99​% confident of estimating the population proportion to within a sampling error…

A: From the provided information, Confidence level = 99% Margin of error (E) = ±0.05 Proportion (p) =…

Q: A consumer group claims that the mean annual consumption of cheddar cheese by a person in the U.S.…

A: Claim: The claim is that the mean annual consumption of the cheddar cheese by a person in US is at…

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.