A school administrator wishes to conduct a poll to estimate the percentage of full time college students who have credit card debt of 2000 or more. what size sample should obtain if she wishes the estimate to be 2.5% percentage points with 94% confidence if  (a) a prior study indicates that the percentage is 34% (b) no prior estimates are used

Q: A company claims that 76% of its employees are satisfied with the work conditions. An independent…

A: Formula of test statistic : z = p^ - pp(1-p)n Where , p^ is sample proportion. p is hypothesized…

Q: you have been assigned the task of conducting a survey to study prescription medication purchases of…

A: Given: Confidence Level = 0.95

Q: The North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement…

A: 1. Here, the sample contains n = 908 randomly selected adults of Country A who are at least 18 years…

Q: The admisnistrators of Rowan university wants to know more about the knowledge of students regarding…

A: Given information Sample size(n) = 35 Sample mean = 58 Standard error = 3.2 Significance level (α) =…

Q: What is the sampling error for an estimate of the population proportion, p = 0.36, if the true…

A: We have to find the sampling error for an estimate of the population proportion

Q: 6. A researcher wishes to estimate the percentage of adults who support abolishing the penny. What…

A: a) Given, Margin error (E) = 0.03 Sample proportion = 0.34   The objective is to find the sample.…

Q: Suppose we take a random sample of 30 companies in an industry with 200 companies. We calculate the…

A: A random sample of 30 companies is selected from a population of 200 companies.

Q: 4. Failure to meet payments on student loans guaranteed by the United States (U.S.) government has…

A: Given Data; p^=147350=0.42   p=0.5 n=350

Q: n order to predict how a school district would have scored when accounting for pawerty and other…

A: Given data  Running Regression analysis in excelData--> Data Analysis-->Regression--> The…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: The North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement…

A:

Q: According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by…

A: sample size(n)=218No. vehicles were not covered by insurance(x)=33

Q: Suppose a cable network wants to determine the current percentage of customers who are under the age…

A: GivenMargin of error(E)=3%=0.03confidence level=90%

Q: The Ghana Revenue Authority (GRA) publishes annual figures on individual income tax returns in…

A: Givena) The population under consideration includes all individuals who are eligible to file income…

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: During the 2004 election year, new polling results were reported daily. In an IBD/TIPP poll of 910…

A: It is given that the sample size is n=910. The number of respondents who reported that they were…

Q: What is true about the sampling distribution of the mean retings reported to you by the market firms

A:

Q: sider that Roane county, which calculated that the average firm size (in terms of number of…

A:

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: A polling agency wants to determine the percentage of voters in favor of extending tax cuts. They…

A:

Q: 1) In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing…

A:

Q: Recall the earlier example of assessing the risk of loan defaults. Suppose the bank's top managers…

A: Given information: Category Performing Loan Defaulted Loan A("zero" risk) 0.25 0.2 B(solid)…

Q: A balance used in an entomology lab to weigh grasshoppers is quite old and has been used for…

A:

Q: An internet service provider (ISP) has experienced rapid growth in the past five years. As part of…

A: a.   Consider that µ is the population mean for daily usage times for the​ ISP's customers.

Q: A Polling agency wants to determine the percentage of waters in favour of extending tax cuts. they…

A:

Q: The IRS is interested in estimating the total number of tax accounts who has their own tax returns…

A: A random sample of 100 returns showed that 15 were audited; n=100 x=15 α=0.95

Q: there are many reasons adults use credit cards. A recent survey found that 58% of adults used credit…

A: A recent survey found that 58% of adults used credit cards for convenience. p = 0.58 a) to conduct a…

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

A:

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: 3) In 2005, 21% of Americans reported that they smoked cigarettes. In a recent study to see if the…

A:

Q: What decisions can be made on the basis of The Harris Poll survey that measures the reputations of…

A:

Q: Bloomberg Research Corporation conducted a random survey on tax preparation methods. Data was…

A: The question is about sampling distribution.Given :No. of adults in a survey ( n )  = 17400No. of…

Q: A survey is to be conducted for young adults between the ages of 22-29 to determine their level of…

A: Given information: Given that a survey is to be conducted for young adults between the ages of 22 –…

Q: ve bi

A: It would be better if we enquire with all students, when the strength of class students is little.…

Q: In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were were asked…

A:

Q: A gas station attendant would like to estimate p, the proportion of all households that own more…

A: Here the problem is under calculation. The gas station attendant trying to find the proportion of…

Q: A tv sports commenter wants to estimat th proportion of citizens who "follow professional football."…

A:

Q: The admisnistrators of Rowan university wants to know more about the knowledge of students regarding…

A: State the given values. Now, we know that

Q: San Gabriel office of statistics believes that the minimum salary of workers in the city is about…

A: One sample t-test: The one -sample t -test is used to determine whether the mean of sample differs…

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: Has the law that mandates the use of bicycle helmets failed? The National Cycling Association wants…

A: Dear students as per guidelines we answer the first three subparts only. Solution To find confidence…

Q: 2.  A random telephone survey of 1,051 adults (aged 18 and older) was conducted by an online tax…

A: Each variable can be categorized into two types. They are: Quantitative  Qualitative Quantitative…

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.