A state legislator wishes to survey residents of her district to see what proportion of the electorate is aware of her position on using state funds to pay for abortions. (Round your answers up to the nearest integer.) (a) What sample size is necessary if the 95% CI for p is to have a width of at most 0.12 irrespective of p?  263 people   If the legislator has strong reason to believe that at least 6/7 of the electorate know of her position, how large a sample size would you recommend to maintain a width of at most 0.12?

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: 19) A manufacturer of golf equipment wishes to estimate the number of left- handed golfers. How…

A: We have find confident proportion. .

Q: Suppose a recent survey found that 74% of dog owners say their pet appears cheerful, while only 59%…

A: Given, p^1=0.74p^2=0.59

Q: Suppose it is reported that 66 % of people subscribe to a cable or satellite television service. You…

A: As per our guidelines, we are allowed to answer first three sub-parts . Thanks   population…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: By using the standard normal table, the critical value zα2 at the 99% confidence level is, 2.576.…

Q: About 10% of the human population is left-handed. Suppose a researcher speculates that artists are…

A:

Q: You are the operations manager for an airline, and you are considering a higher fare level for…

A: Given : ME< 2.0 σ= 8.0 At 90.0 % confidence level , z score= 1.645 Need to find the minimum…

Q: According to Money, 13 percent of all households own stocks. An economist wants to test this claim…

A:

Q: In the context of a hypothesis test, the value obtained for Cohen’s d differs from the value…

A: One of the most popular methods for determining effect size is Cohen's D. The scale of an impact is…

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A: Claim : both machines produce the same fraction of defective parts.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: It is given that margin of error (E) is 0.055 and the confidence level is 0.90.

Q: The City of South Lake Tahoe, CA, has an Asian population of 1,419 people, out of a total population…

A: We perform Chi-square test for goodness of fit. Chi-square test Statistic is given by,…

Q: You are the operations manager for an airline, and you are considering a higher fare level for…

A: formula for the sample size needed to estimate a population proportion is

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone. A…

A: Given Information: 43% of the respondents stated that they talk to their pets on the telephone. A…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Find z-critical value:…

Q: 12. Political Science, Inc. (PSI) specializes in voter polls and surveys designed to keep political…

A: Given,margin of error(E)=0.03sample proportion(p^)=0.44α=1-0.99=0.01α2=0.005Z0.005=2.5758   (from…

Q: Consider the following situation: In order to gather as many responses as possible for a survey you…

A: In the given situation, the respondents are asked to distribute the questionnaire to their…

Q: Examine by contingency table method, whether the nature of area is related to voting preference. The…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: a)

Q: Compute the following sample sizes. Use the appropriate formula. If necessary, round to the nearest…

A: Given : A random sample of 32 retail stocks such as Toys ‘R’ Us, Best Buy , and Gap were studied for…

Q: Suppose you want to test the claim that μ > 25.6. Given a sample size of n = 47 and a level of…

A: given data,μ>25.6n=47, df=n-1=47-1=46α=0.01

Q: A population consists of a batch of 24,649 aspirin tablets, and it includes 902 that are defective…

A:

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A:

Q: 1. Nationwide, the average total amount of student loan debt in 2012 is normallydistributed with a μ…

A: Given information Hypothesized mean µ = $29400 Sample size (n) = 36 Mean x̅ = $27400 Sample Standard…

Q: 27. What sample size should you take to be 95% confident that the estimate of the true proportion of…

A:

Q: A genetic theory says that a cross between two pink flowering plants will produce red flowering…

A: Solution-: Given: We find value of sample size, n=?

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: It is given that in a survey 45% respondents accept that they talk to their pets on phone. To check…

Q: During the first 13 weeks of the television season, the Saturday evening 8:00 p.m. to 9:00 p.m.…

A:

Q: Large passenger vans are thought to have a high propensity of rollover accidents when fully loaded.…

A:

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: given  P0 =0.37 n=170

Q: A restaurant is planning to remove fried chicken from the menu. Sales are said to have fallen below…

A:

Q: Members of the city council want to know if a majority of city residents supports a 1% increase in…

A: Since the value p-value is significantly large P-value=0.18 hence we will not be able reject the…

Q: During the first 13 weeks of the television season, the Saturday evening 8 p.m. to 9 p.m. audience…

A: Define that pi’s are the proportion of the audiences for ABC, CBS, NBC and independents,…

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern plke over 20…

A: a) Denote p as the true proportion of guests who catch pike over 20 pounds.

Q: Which of the following is true based on the results of this survey?

A: A Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15…

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: Given,n=240x=104p^ =xn p^ =104240 p^ =0.4333H0 :P=0.45H1 : P<0.45α=0.01

Q: A business journal investigation of the performance and timing of corporate acquisitions discovered…

A: Solution: Let X be number of firms announced one or more acquisitions during the year 2000 and n be…

Q: Consider an environmentalist examines two forests, forest A and forest B. The proportion of maple…

A: Given: n1=35n2=35p^1=0.38p^2=0.24

Q: A business journal investigation of the performance and timing of corporate acquisitions discovered…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: (A) Given that, Critical value: Using the z-table, the critical value at 90% confidence level is…

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone, A…

A: The hypothesized proportion is 0.43.

Q: if Amy Cuddy and her research team originally established a sample size of n=200 (100 in each group)…

A: Given, 1st sample size n1= 200 No. of success samples = x1 = 86 Proportion success of sanple 1, P1…

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: From the provided information, The test statistic value z = -0.52. Level of significance (α) = 0.01

Q: a) Assume that nothing is known about the percentage of adults who have heard of the brand. n=…

A: The following information is provided that is required to compute the minimum sample size:…

Q: 12) A newspaper article about the results of a poll states: "In theory, the results of such a poll,…

A: Here AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION PLZ REPOST FOR REMAINING  Here confidence…

Q: A school principal claims that the numeracy rate of the senior high school students in his school is…

A: Given p=0.6, pcap=200/500=0.4, n=500, alpha=0.05 1. H0:p=0.60 vs H1:p!=0.60 2) alpha=0.05 3) Test…

Q: With a sample size of 400

A:

Q: The City of South Lake Tahoe, CA, has an Asian population of 1,419 people, out of a total population…

A:

Q: A business journal investigation of the performance and timing of corporate acquisitions discovered…

A: Solution: Let X be number of firms announced one or more acquisitions during the year 2000 and n be…

Q: Does it appear that there is too much mercury in tuna sushi? O A. Yes, because it is possible that…

A: A food safety guideline is that the mercury in fish should be below 1 part per million. The given…

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.