You have 165 observations of experiments in which a subject tried to guess which of 4 videos a psychic "sender" was watching in another room. Of the 165 cases, 61 resulted in successful guesses. What sort of distribution is this from? What are the sample mean and standard deviation? Compute a 95% confidence interval for the probability of a successful guess. Does this convince you of ESP? Why or why not?

Q: Use the Student's t distribution to find t, for a 0.95 confidence level when the sample is 27.

A: sample size=n=27 Degree of Freedom=n-1=27-1 =26 Confidence level is 0.95 Therefore the Level of…

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Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

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

A:

Q: 3. You want to find out the percent of people who use an iPhone, so you survey 120 random adults, of…

A: Here we need to construct a 95% confidence interval for the population proportion.

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A: Given: x=297n=540c=99%=0.99

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Q: Campus athletics is interested in the proportion of registered students living on campus who play…

A: The 95% confidence interval is (0.12, 0.18).

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Q: how many people should you sample? 4 80 125 382 383

A: Given : Margin of error: ME = 0.05

Q: n a recent poll, 510 people were asked if they liked dogs, and 45% said they did. Find the Margin of…

A: Given Data Sample Size, n = 510 p̂= 0.45 Significance level, α =1-0.99…

Q: random digit dialing telephone system was used to conduct a survey asking 3230 city residents; "do…

A:

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A: Given that,  n=678x¯=3.22s=1.99 The point estimate of the population mean is sample mean. That is,…

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A:

Q: 19) How much money does the average professional football fan spend on food at a single football…

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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: Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is…

A: The row and column totals are,   Positive test result Drug Use Is Indicated Negative test results…

Q: 1. A Pew Poll conducted in 2013 surveyed a random sample of 200 adult Americans and 36 of them said…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: 11. A television station surveys 200 customers and finds that 23% of customers watch the evening…

A: Margin of error = z*√(pq/n) Where z= z value            n=no of customer            q=1-p…

Q: If you are taking a random sample from a normal population with  a population mean = 100 and…

A:

Q: 6. A consumer watch group interviewed a random sample of 1,000 consumers and asked them if they are…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: A social science research project has a level set at .05. What is the probability of the researchers…

A: alpha = 0.05

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Q: Mr. Price calculates a 95% confidence interval for the difference between the proportion of Aaron…

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Q: . A sociologist develops a test to measure attitudes about public transportation, and 20 randomly…

A: Answer - A sociologist develops a test to measure attitudes about public transportation,…

Q: If n=200 and ˆpp^ (p-hat) =0.39, find the margin of error at a 99% confidence level

A: Find z-critical value:…

Q: A sociologist develops a test to measure attitudes about public transportation, and 20 randomly…

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A: Given X=600 n=1000

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Q: Refer to the sample data for polygraph tests shown below. If one of the test subjects is randomly…

A: Total number of subjects N = 108 Number of subjects lying NL = (12 + 37) = 49

Q: If n= 220, p-hat= .4, then what will be the 87.4% confidence interval for the population proportion?

A:

Q: n our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affordable…

A: Given that, n=255,x=75

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: 0:361) 41. A study done by researchers at Alfred University concluded that 80% of all student…

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Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

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Q: As the sample size gets smaller, what happens to the width of your confidence interval? O Wider /…

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Q: Thirty randomly selected students took the calculus final. If the sample mean was 95 and the…

A: The summary of statistics is, The degree of freedom is, Critical value: By using the t-tables, the…