13. In another pre-election poll, a pollster finds that 438 out of 600 people polled favor Smith. Construct the 95% confidence interval for the proportion (to nearest 0.001) of people in the whole population who

Q: 5. Suppose a larger (independent) random sample of 100 Ann Arbor residents is taken and the 90%…

A: The number of random samples is n=100 The 90% confidence interval is (0.54,0.70)so the  lower limit…

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: 12)     If n=410 and ˆpp^ (p-hat) =0.23, find the margin of error at a 95% confidence level Give…

A:

Q: Suppose we know that a confidence interval is (27,35), with a margin of error of 4. Find the sample…

A:

Q: The student government association at a university wants to estimate the percentage of the student…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.90.

Q: 11). A sample of 400 racing cars showed that 80 of them cost over $700,000. What is the 99%…

A: Given: n= 400  Number of cars in the sample that costs over $700000 = 80  the sample proportion of…

Q: If n=520 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer to…

A: Given data,n=520p=0.47z-value at 90% confidence is Zc=1.645Margin of error(E)=?

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: 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: A 99% confidence interval (with n = 1, 018) estimates the actual mean amount of data usage a month…

A: It is given that, the 99% confidence interval is (5.701, 6.599).

Q: Suppose we know that a confidence interval for a population mean is (53, 67), with a margin of error…

A:

Q: what would you conclude compared with ten years ago

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

Q: 2. In a random sample of 87 college students, the average number of GroupMe messages handled in one…

A:

Q: .

A: It is given that 800 out of 1,000 students use Facebook during class.The sample proportion is…

Q: 3 2 2 2 4 3 3 5 2 2 4 2 2 3 3

A: From above data the households that are very satisfied with the house they are living is x= 39…

Q: A business student is interested in estimating the 99% confidence interval for the proportion of…

A: Here, confidence level is 0.99 and margin of error is 0.04.

Q: 1. Suppose survey results say that 69% of the adult females from a sample taken in the United States…

A: Proportion (p) = 69 %  Margin of Error (E) = 3%  Alpha = 95%  FIRSTLY calculate the confidence…

Q: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: Suppose that a random sample of 60 horror movies containing 100 character deaths was collected.…

A: we must identify zα/2 and the margin of error, E. The confidence level is stipulated to be 0.95,…

Q: 30. A research and development engineer is preparing a report for the board of directors on the…

A: Answer: Take a new sample from the population using a larger sample size.

Q: A study found a confidence interval on the proportion of children that are hearing impaired was 0.04…

A: Given confidence interval is 0.04 to 0.16 i.e., p-E=0.04 -->1 p+E=0.16 -->2

Q: 7) The following is a 95% confidence interval of the proportion of female medical school students:…

A:

Q: 5, Randomly selected middle-aged people in both China and the United States were asked if they…

A: For China, n =1300 and x = 1170 therefore p^1 =11701300 = 0.9 For USA,  n = 150 and x =110 p^2…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: Suppose a drug for stomach discomfort is tested on 75 subjects, and the mean time for it to take…

A: Given: Sample size n = 75 Sample mean X = 200 Population standard deviation σ = 30 Formula Used:…

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

Q: In a survey conducted by CNN, 130 of the 250 people that were randomly surveyed have a savings…

A: Given data, n=250 x=130 Sample proportion p=x/n =130/250=0.52 z-value at 90% confidence is Zc=1.645

Q: A sociologist wants to construct a 96% confidence interval for the proportion of children aged 5 –…

A: The z-value for 96% confidence is2.054     ∴ z∝12=2.054a)Given data ,P=0.20M.E=0.02n=?W.C.T…

Q: Suppose a drug for stomach discomfort is tested on 50 subjects, and the mean time for it to take…

A: To find the confidence interval we will use z distribution because the population standard deviation…

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: Suppose the Statistics Department at TAMU wants to create a confidence interval for the proportion…

A:

Q: Nearly one half of americans aged 25 to 29 are unmarried.  How large a sample is necessary to…

A: The formula for the sample size is as follows:

Q: The student government association at a university wants to estimate the percentage of the student…

A: Solution

Q: Based on data from a survey of 1,300 randomly selected Facebook users, a 95% confidence interval for…

A: Given Information:  Sample size (n) = 1300  Confidence interval = 95%

Q: John randomly selects five students from the BMS 200 class, and collects data on the number of hours…

A: From the given confidence interval we find the solution for given problem.

Q: a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is…

A:

Q: An economist needs to estimate the proportion of residents of Sebastian that have earned a college…

A:

Q: b. If many groups of 537 randomly selected Americans were surveyed, then a different confidence…

A: ANSWER:-  95% confidence interval means 95% confident contains true mean of the population. Means…

Q: 3. Michael wants to make a confidence interval estimate for the proportion of community members in…

A:

Q: If n=330 and p (p-hat) -0.27, find the margin of error at a 90% confidence level Give your answer to…

A:

Q: A sociologist is comparing the proportion of teenage boys who receive a text message at least once…

A: The  Conditions for the Confidence interval for the difference in population proportions • Samples…

Q: Suppose you calculate a 99% confidence interval of 14.71 to 21.64. Determine the margin of error.

A: Given information- We have given a value of 99% confidence interval is- C.I = (14.71, 21.64) Lower…

Q: Suppose, upon constructing a 95% confidence interval based on your sample proportion of 0.28, you…

A: It is given that, A random sample of 125 M&M candies is selected where 28% are blue. Sample…

Q: 2. A sample of 430 business applications included 150 men. Find the 99% confidence interval of the…

A: Answer:-  Given,  X=150 n=430

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: Imagine that the confidence interval around a candidate's popularity score is [37.22,48.86],what is…

A: The confidence interval provides an estimated range of values that includes an unknown population…

Q: a. Suppose that a random sample of 41 state college students is asked to measure the length of their…

A: Since you have posted multiple sub-parts, we will solve the first three sub-parts for you. To get…