Q4. You conduct a poll comparing two candidates. In a poll of 400 people, 190 prefer candidate A, and 210 prefer B. . E.If you want to shrink one stdev error to 1%, how many people do you need to survey?

Q: Apolster wishes to estimate the proportion of Unted ates voters who lavor capital punishment How…

A:

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A: From the provided information, Margin of error (E) = 0.06 Confidence level = 95% The Z value at 95%…

Q: Using a random sample of 3800 TV households, a media research company found that 50.3% watched the…

A:

Q: What is the percentile rank of a student who is enrolled in 15 credits? (Hint: This is the same…

A: Given that , A survey of the population of 51 students asks how many credits students are taking and…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: A humane society claims that less than 73% of households in a certain country own a pet. In a random…

A: Given,n=500x=355p^=xn=355500=0.71α=0.05H0:P≥0.73Ha:P<0.73

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A: It is given that:

Q: Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a…

A:

Q: Approximately 7% of the population has the O- blood-type. If you drew a random and independent…

A: p= 0.07   n = 2065

Q: A television station wants to estimate the number of viewers it had for a new show. They know that…

A: Explained below

Q: 2. A recent report on elementary schools in Kent county claimed that 13% of elementary students…

A: Let p be the population proportion  X=number of people typically walk to a school  n=random sample…

Q: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: I dont have an example forthe problem question 22, so I am having trouble. Please help.

A: Introduction:Suppose a random variable X has mean μ and standard deviation σ.Let X = x be the cutoff…

Q: 2) You are planning a survey for which the findings are to have a 95% level of confidence. How many…

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

Q: Risa is studying dating behavior of college students. She asks students at her school how many…

A: Given :-   μ = 7.50σ = 2.25 a. What percentage of college students has had fewer than 4 romantic…

Q: RANDOM STUDENTS WERE SURVEYED TO DETERMINE WHICH SNACKS SHOULD BE OFFERED AT THE SCHOOL'S MOVIE…

A: Part A : percentage of students selected churros or candys = A/q Let "x" be the percentage of…

Q: David is doing a research project in political science to determine the proportion p of voters in…

A: Let p represents the proportion of voters in David's district who favor capital punishment. A. The…

Q: skipping lunch- A nutritionist wishes to determine, within 3%, the true proportion of adults who do…

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: candidate for the municipal elections wishes to survey residents of her district to see what…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: oward revisions in the health care system. The president wants the estimate to be within 0.02 of the…

A: The  population proportion (p) of people that supports  health care revisions is given as 0.61.  The…

Q: nursing school professor is interested in determining how her college students compare to the…

A: Given, mean (µ) = 100 standard deviation (σ) = 20 Let X denote the exam score, then, X ~ Normal (µ =…

Q: ABC company, a textile manufacturing company, has recorded defects in their production for a month…

A: Total defects is 55+38+10+5+2 =110 Number of defective in top 3 is 55+38+10 =103.

Q: A team is studying the proportion of people who drop out of college. They wish to estimate the…

A: A team is studying the proportion of people who drop out of college. They wish to estimate the…

Q: 1. James expects to get an 85% on his statistics final, but admits the margin of error is 15%. What…

A: Solution-: Given: We find the lowest score James expects to receive=?

Q: the brand manager for a toothpaste brand must plan a campaign designed to increase brand…

A: The error is ±1.96×p1-pn=0.05assume p=0.5. This will give the most conservative estimate square on…

Q: Q2/C/A coin is weighted so that heads is twice as likely to appear as tials then P(H) =

A: Given: A coin is weighted so that heads is twice as likely to appear as tails. We are asked to find…

Q: Q4. You conduct a poll comparing two candidates. In a poll of 400 people, 190 prefer candidate A,…

A: In this question we are taking the sample of 400, out of which 190 prefers A and 210 prefers B.This…

Q: Using percentiles, the difference between which of the following is the interquartile range? Select…

A: Interquartile range: The interquartile range (IQR) is also called the midspread, middle 50%, or…

Q: 4. A student discovers that her grade on a recent test was the 65tm percentile. If 320 students took…

A: The grade of the student is the 65th percentile of the whole class.

Q: person waited before being served was noted and the results are shown in the charts below.  How…

A: Given that:

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: We want to find P-value  n=25 , p=0.4 , p0=0.5

Q: If we want to estimate the difference in two population proportions within 0.02 with 95% confidence…

A: We have to find sample size.

Q: µ = 9 has Σ X = 54. How many scores are in the populatio

A: Given that   A population with mean (μ) = 9 Summation of data values  Σ X = 54   We know that Mean =…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Solution: From the given information, confidence level is 0.95 and E=0.05. Since the proportion is…

Q: You are interested in the effectiveness of a new sample of 7 people's blood pressure before and…

A: By applying a paired 't'test, a)  sample size,n= 7 Mean (d̄) =Σd/n = 22/7 = 3.1429  standard…

Q: A repeated measures study with n=26 participants produces a mean difference of M D = 3 points,…

A: From the given information, paired sample size is 26, mean difference is 3 points, t value is 2.50…

Q: John Davis, a manager of a supermarket, wants to estimate the proportion of customers who use food…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: a programmer plans to develop a new software system. In planning for the operating system that he…

A: a) The confidence level is 99% Therefore, α = 0.01 and α/2=0.005. The margin of error is 3% =0.03…

Q: Using a random sample of 4300 TV households, a media research company found that 62.2% watched the…

A: n = 7100

Q: How hard is it to reach a businessperson by phone? If p is the proportion of of calls. How many…

A: Solution: Given information: Margin of error = E= 0.02 p= 0.18 population  proportion  q= 1-p=0.82…

Q: Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the…

A:

Q: Solve the problem. Round the point estiamte to the nearest throusandth.  6) Find the point estimate…

A: Let X be the people had hearing aids  n be the random sample Given X=20, n=304

Q: One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered "yes".…

A:

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A:

Q: The manager of Carrefour selected samples of 64 customers and computed the sample average amounts…

A: Given sample size n=64Considering the sample size is large, the distribution of amount spent by the…

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A: Given that no preliminary sample is taken to estimate the proportion of females. let the sample size…

Q: LOAD YOUR WORK TO GOOGLL CLAJS ne top 10 percent of the scores on a test become eligible for a…

A: From the given information, Consider, X be the random variable that shows the scores of the students…

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.