1. Suppose survey results say that 69% of the adult females from a sample taken in the United States registered to vote. The margin of error is +/- 3% based on a confidence interval of 95%. How would you interpret the results?

Q: Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval…

A: a. Margin of error: Margin of error is a range of values that lie above and below the sample…

Q: 2. Suppose that you take a random sample of 360 people who voted in the last election in a heavily…

A:

Q: 13. Suppose you have estimated that the 95 % confidence interval for B₁ is {0.750 , 0.950}. Which of…

A: Given that  Suppose you have estimated that the 95 % confidence interval for B₁ is {0.750 , 0.950}.…

Q: If instead of 25, 80 male runners are selected for the study, what is the sampling error at 95%…

A: It is given that Sample size n = 80 Sample mean M = 53 Population SD = 5.5 Margin of error E = 0.8…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Sample size:The minimum sample size for a desired confidence level, α with a given margin of error,…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 4% = 0.04 Confidence level = 0.95

Q: If n=550 and ˆpp^ (p-hat) =0.25, find the margin of error at a 99% confidence level Give your…

A: The margin of error = The margin of error (ME) expresses to the maximum expected differences between…

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

A:

Q: 2. A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: We have given thatn = 1200x = 200p̂ = x/n = 200/1200 = 0.167Significance level (α) = 1 - 0.95 = 0.05

Q: 4. 14 out of 20 voters in Pennsylvania reported having voted for an independent candidate. It is…

A: Critical Value: In a test of hypotheses, Critical Values are the cut-off values that provide the…

Q: (b) What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: Suppose that a national poll of 300 registered Republicans was conducted this week and 165 stated…

A: Given that, Suppose that a national poll of 300 registered Republicans was conducted this week and…

Q: Refer to the following scenario. Ah epidemiologist is worned about the prevalence of the flu in…

A: Givenx=39n=334p^=xn=39334=0.116766Margin of error(E)=0.05Confidence…

Q: What proportion of homes for sale in Ohio are sold through a real estate agency? In a survey of a…

A: The confidence interval is 0.69 to 0.81.

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: In a middle school with 500 students, it was found that the true proportion of brunettes is 17.8%.…

A: To find: which of the following statements will be true?

Q: If n = 200 and p^ = 0.64, find the margin of error at a 95% confidence level.

A:

Q: If n=300 and ˆpp^ (p-hat) =0.52, find the margin of error at a 90% confidence level Give your…

A: Suppose p is the true proportion.

Q: If n=11, ¯xx¯(x-bar)=32, and s=9, find the margin of error at a 98% confidence level

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: If n=450 and ˆpp^ (p-hat) =0.48, find the margin of error at a 99% confidence level Give your…

A: Given n=450 and p^=0.48, level of significance ɑ=0.01

Q: If n=210 and ˆpp^ (p-hat) =0.86, find the margin of error at a 90% confidence level Give your…

A:

Q: In the 2004 presidential election, exit polls from the critical state of Ohio provided the following…

A: There are two independent samples which are Bush and Kerry. The sample size for both samples is…

Q: Suppose a researcher found that M= 30.00 and SEM= 3.00. What are the limits of the 68% confidence…

A:

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: Suppose that you plan to apply the one-mean z-interval procedure to obtain a 90% confidence interval…

A: It is given that the population standard deviation is 12 and the sample size is 9.

Q: 2. A researcher wants to estimate the daily expenses of college students. He wants a 95% confidence…

A: We have given that,  Population standard deviation (σ) = 99.50, margin of error (E) = 45 and…

Q: (a) If researchers decide on a 4.2% margin of error for a 95% confidence interval. What sample size…

A: From provided information, Sample proportion is (p̂) = 50% i.e. 0.5 The sample size can be…

Q: Show that in Example 4.4.7, page 153, the difference between the two candidates is statistically…

A: The 68-95-99,7 rule says that for a 99.7 confidence interval there is a 3standard error difference…

Q: If n=130 and ôp (p-hat) =0.93, find the margin of error at a 99% confidence level Give your answer…

A: Here, the margin of error for proportion p^ is to be calculated. The formula is given by, z*p^1-p^n,…

Q: If n=270 and p (p-hat) =0.93, find the margin of error at a 90% confidence level Give your answer to…

A:

Q: If n=120 and p (p-hat) =0.31, find the margin of error at a 99% confidence level Give your answer to…

A: Sample size, n = 120 p^ = 0.31 99% confidence level

Q: 1. Suppose you compute a confidence interval with a sample size of 40. What will happen to the…

A:

Q: If n=340 and p (p-hat) =0.23, find the margin of error at a 95% confidence level Give your answer to…

A: Given,n=340p^=0.23α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: If n=190 and ˆpp^ (p-hat) =0.29, find the margin of error at a 90% confidence level Give your…

A:

Q: Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a…

A:

Q: If n=170 and ˆpp^ (p-hat) =0.23, find the margin of error at a 99% confidence level Give your…

A: Find z-critical value:…

Q: A pollster wants to conduct a pre-election poll with a margin of error of 2.5% and a 95% confidence…

A: We have given that,  Margin of error (E) = 2.5% = 0.025 and confidence level = 95%  Then, We will…

Q: If n=12, ¯xx¯(x-bar)=48, and s=6, find the margin of error at a 98% confidence level

A: From the provided information, Sample size (n) = 12 Sample mean (x̄) = 48 Standard deviation (s) = 6…

Q: If n = 520 and p^ = 0.85, construct a 99% confidence interval

A: Here, n = 520 and p hat = 0.85.

Q: 19) A political survey had a margin of error of 4.25%. If the surveyor used a 90% confidence level…

A: Assume p-hat as 0.5, since no preliminary estimate is available.

Q: Suppose you are designing a survey of firework plans among Kansas residents. You would like for the…

A: Here we need to find the required sample size with a 95% confidence level to estimate the number of…

Q: Jump to level 1 1. In a poll of 1000 randomly selected voters in a local election, 414 voters were…

A: We have given that,  Sample size (n) = 1000 and favorable cases (X)= 414 Then,  We will find the…

Q: If n=380 and p (p-hat) =0.49, find the margin of error at a 99% confidence level Give your answer to…

A: Answer - If n = 380,   P^ = 0.49                  99% confidence interval         ⇒ α =1 - 0.99 =…

Q: If n=480 and p^ (p-hat) =0.45, find the margin of error at a 90% confidence level Give your answer…

A:

Q: Suppose you didn’t know whether the coin was fair or not and you wanted to determine a 95%…

A: It is given that sample size (n) is 16,000 and x is 8040.

Q: If n = 360 and p (p-hat) =0.88, find the margin of error at a 90% confidence level. Round to 4…

A: Find z-critical value:…

Q: If n=410 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer to…

A: The random variable X follows binomial distribution. The sample size is 410. The sample proportion…

Q: If n=350 and p (p-hat) =0.28, find the margin of error at a 99% confidence level Give your answer to…

A: n = 350p^ = 0.2899% confidence level