A car parts company wishes to find the defect rate of a certain part. To that end, they select a random sample of the part and test them; of 512 items tested, 16 are found to be defective. Use this data to construct the 95% confidence interval for the defective rate; i.e. find a confidence interval for the proportion of all such items that are defective

Q: A random sample of 80 people was selected, and 22 of the selected people indicated that it would be…

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Q: Find the value of t a/2 for a 99% confidence interval when the sample size is 30

A: Given Confidence = 99% n=30

Q: (a) What is the rat's sample proportion p? What is the large-sample 95% confidence interval for p?…

A: Given: Population size, n = 80 Sample size, x = 80 Sample proportion, p^: p^=8080=1

Q: To assess the effectiveness of a kindergarten-readiness program, 15 children from a random sample…

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Q: using the given degree of confidence and sample data to construct a confidence interval for the…

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Q: The formula P %3D n + 4 is describing the [Select ] method for calculating an approximate confidence…

A: Solution: X=no of successes  n=no of experiments  To find approximate confidence interval for a…

Q: In response to a recent GSS survey on whether the Government should impose strict laws to prohibit…

A: Solution: Let X be the number of subjects said “yes” and n be the sample number of subjects. From…

Q: 3) A corporation employs 148 sales representatives. A random sample of 60 of them was taken, and it…

A: The sample proportion is computed as follows,

Q: nd a 90% confidence interval for for the probability of success θ in a Bernoulli trial with n=48.

A: Confidence interval: It is defined as the range that contains the value of the true population…

Q: In the following data, where the highest possible score is 10. If the population standard deviation…

A: Solution: Given information: n= 30 Sample size  x = ∑xn=18830=6.2667 Sample mean σ= 1.9 Population…

Q: In a random sample of 850 consumers. 385 reported that they were able to purchase a Playstation 5.…

A: According to the given information, we have In a random sample of 850 consumers. 385 reported that…

Q: The production manager in an automobile plant is concerned with the number of cars that do not pass…

A: Not acceptable = 120-92 = 28

Q: The owner of the AGT Gas Station wishes to determine the fraction of customers who pay using a…

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Q: The figure to the right shows the results of a survey in which 1003 adults from Country A, 1024…

A: Given information For country A p-hat = 0.35 n = 1003

Q: In a 2009 Gallup Poll, 441 of 507 adults said it was “morally wrong” to clone humans. Assume Gallup…

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Q: An independent-measures research study uses a total of 18 participants to compare two treatment…

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Q: The figure to the right shows the results of a survey in which 1010 adults from Country A, 996…

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Q: A survey of 620620 men shoppers found that 1111% of them shop on impulse. What is the 9595%…

A: Given,sample size(n)=620sample proportion(p^)=0.111-p^=1-0.11=0.89α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: What value of z should be used to calculate a confidence interval with a 95% confidence level?

A: The z value which is used to calculate 95% confidence interval is defined as P(-zvalue < Z <…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence…

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Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: Note- Here I am taking the sample size as 380 because then only the answer will match with the given…

Q: During a laboratory analysis of human blood composition, tests are repeated and are known to be…

A: From the provided information, The mean and standard deviation of the sample data can be obtained…

Q: Gallup is a company that conducts daily opinion polls on a variety of topics. In a recent daily…

A: Given that, Sample size, n = 1000 38% of the sample said they were committed to their work.

Q: A regional survey of 561 companies asked the vice president of operations how satisfied he or she was…

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Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Solution-:  Given: n=200, X=118, \alpha=0.02 We find 98% C.I. for the true population proportion

Q: A researcher computed a 90% confidence interval for the proportion of students who smoke. If the…

A: False. Relationship between confidence level and error:The error value increases when the confidence…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

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Q: In a certain high school, 7 out of 11 juniors said that they planned to go to the winter prom.…

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Q: In a statistics activity, students are asked to determine if there is a difference in the proportion…

A: Given : Claim : there is a difference in the proportion of times that a spinning penny will land…

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

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

Q: A researcher chooses a simple random sample of 100 Lexington, Kentucky, residents and finds that 20…

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Q: In exploring possible sites for a convenience store in a large neighbourhood, the retail chain wants…

A: Determine whether the given margin of error is appropriate if  the random sample of size n = 100…

Q: In the context of the previous problem, construct a 99% confidence interval estimate of the mean red…

A: Given information Sample size n = 50 Sample mean = 4.63 Population standard deviation = 0.54…

Q: If he wants to limit the margin of error of his 98% confidence interval to 3%, what is the minimum…

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Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

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

A: It is given that:

Q: If a corporation wishes to construct a 95% confidence interval for the proportion of all adolescent…

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Q: From a random sample of 100 women, 15 have dangerous reading blood sugar levels higher than 300…

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Q: For each of the following sets of sample outcomes, use Formula 7.3 to construct the 99% confidence…

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Q: The data given to the right includes data from 39 candies, and 5 of them are red. The company that…

A: From the provided information Sample size (n) = 39 5 of them are red that is sample proportion (p̂)…

Q: The table below shows the number of car wrecks that occur during certain times of the day: Time 12 -…

A: Part (A) The 95% confidence interval for proportion of wrecks is given by the formula: Find the…

Q: In a recent poll, 19% of respondents answered option A. The margin of sampling error was plus or…

A: Given information- The percentage of the population answered A is, p = 19% The margin of error, E…

Q: The z value for a 96.6% confidence interval estimate is?

A: z value for a 96.6% confidence interval estimate is?

Q: 1) Jaimie does a study on how many students have passed his classes in the past. He finds that 2739…

A: The random variable students who pass follow normal distribution. The number of successes is 2739.…

Q: A psychologist has designed a psychotherapy programme for people suffering from obesity, and wanted…

A: Given, sample size, n = 13 For n<30, the 90% confidence interval for the mean…

Q: A random sample of 80 people was selected, and 22 of the selected people indicated that it would be…

A: Given information: Sample size n=80 Number of selected people who indicated that it would be a good…

Q: A random sample of married people were asked "would you remarry your spouse if you were given the…

A: Given information x = 127 N = 150

Q: In the construction of confidence intervals, if all other quantities are unchanged, a increase in…

A: Given : sample size in increased

Q: In a survey of 900 adults, 240 said that they watched the World Cup final on television. Using these…

A: Given, The sample proportion is,

Q: Of 500 randomly selected college students, 200 use a particular brand of mobile phone. Assuming that…

A: Given : x = 200 n = 500 p^=xn=200500=0.4The formula for confidence interval is :p^±zcp^(1-p^)n

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.