We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500 adult residents sampled, 367 like chocolate. Based on this, construct a 90% confidence interval for the proportion (p) of adult residents who like chocolate in Ventura County.

Q: what is measured by a confidence interval and describe the factors that affect the width of a…

A: How much ambiguity there is for any given statistic is a confidence interval. Confidence intervals…

Q: A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect…

A: Given : p̂1 = 0.54 p̂12 = 0.89 n1 = 1063 n2 = 1064

Q: Hospital records indicate that 52 men out of a sample of 1,000 versus 23 women out of a sample of…

A: Introduction: Denote p1, p2 as the true population proportions of heart disease among men and women…

Q: In a survey of 3153 adults aged 57 through 85​ years, it was found that 86.8​% of them used at least…

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Q: The confidence interval was (41%, 45%) What was the margin of error? +/- % What was the summary…

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Q: If the margin of error in an estimate for the mean weight of a shipment is + or -2 pounds at a…

A: From the provided information, The margin of error at a confidence level of 95 percent = ±2 The…

Q: What are the conditions for a confidence interval?

A: A confidence interval tells the possible range around the estimate and also how stable the estimate…

Q: . How many of the 3335 subjects used at least one prescription​ medication? b. Construct a​ 90%…

A: n = 3335 p = 0.804

Q: Generally speaking, what is the difference between a confidence interval and a prediction

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Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 400…

A: Given that,   The sample proportion is, Critical values: By using the standard normal table of Z,…

Q: You want to estimate the proportion of all college students who traveled during spring break.   You…

A: Bhnjhhh

Q: Is the difference between the two indicators significant at the 95% confidence level?

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Q: Suppose you had a sample size of 41 and the population distribution was normal. Which approach would…

A: Here we use basic criteria for getting best interval estimation of mean

Q: What is the impact on the confidence interval estimate if a larger sample is used?

A: Confidence interval:

Q: How will you explain a confidence interval and a hypothesis test to a businessperson who does not…

A: A confidence interval tell us the probability that estimated population parameter lie with in the…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500…

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Q: What can we do to make a confidence interval narrower without changing the confidence level?

A: Confidence interval:  A range of values such that the population parameter can expected to contain…

Q: What should your sample size be if you want a confidence level of 90 percent and a margin of error…

A: We want to find the sample size (n)

Q: What is the margin of error for a 90% confidence interval?

A: It is given that Sample size n = 850 Number of residents support property tax, X = 410 The critical…

Q: process control engineer wishes to estimate the true proportion of defective computer chips by using…

A: GivenThe true proportion p=0.01Let the sample size be n.The Z critical value for 90% confidence…

Q: Seventy-three percent of a sample of 1000 students drive a used car as opposed to a new car or no…

A: Given: Proportion  = 73 % Confidence level  = 80 %

Q: Professor Smith loves dark chocolate, and she would like to find out the proportion of the…

A: Given Information: Sample size (n) = 850 Out of which x = 600 people chose dark chocolate.…

Q: To construct a confidence interval, we have to make three assumptions. explain what are those…

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Q: In a survey of 3485 adults aged 57 through 85​ years, it was found that 86.4​% of them used at least…

A:

Q: Explain the type of Equation used for confidence interval calculation?

A: A confidence interval gives an approximate range of values which is likely to include an unknown…

Q: Explain the steps in computing a confidence interval for ρ?

A: Introduction: The steps to construct a confidence interval in general are: Identify a sample…

Q: What is the relationship between α and the confidence level of a hypothesis test?

A: In hypothesis testing, α is the level of significance, which provides details about the chance of…

Q: Explain when you would use the z value or the t-value to calculate a confidence interval

A: Z value: The z value is used for finding the confidence intervals for single population proportion,…

Q: What is A confidence interval for μ?

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Q: What is z* for a 92% confidence level?

A: To find value of Z* for a 92% confidence level ??

Q: What effect does increasing the sample size have on the width of a confidence interval? I know that…

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Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

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Q: if you increase the sample size and confidence level at the same time. what will happen to the width…

A: The formula for the confidence interval (say) for population mean is :  C.I= x ± zα/2.s2n As the…

Q: Suppose we would like to estimate the proportion of all NBA fans who thought Aaron Gordon won the…

A:

Q: What is the difference between the different confidence interval formulas?

A: Confidence interval is the estimate of the interval of an unknown population parameter. It provides…

Q: What is the lower endpoint of a 95% confidence interval for the percent of students who like online…

A: Given Level of significance ɑ=0.05, x=92, n=134

Q: whats a confidence interval?

A: Confidence intervals: Confidence intervals are the limits for the point estimate of population…

Q: Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20…

A: From the given information, let X be the number of students reported no more than 20 miles per day.…

Q: The pizza Shop wanted to determine what proportion of its customers ordered an only cheese pizza.…

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Q: It is known that the population range equals 60. With a 95% confidence level, the sample size that…

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Q: We wish to estimate what percent of adult residents in Pierce County have a high school degree. Out…

A: The sample proportion is, p^=xn=361405=0.8914 Computation of critical value:…

Q: Please explain the following: For a confidence level of 85%, find the critical value

A: Given information Confidence level α = 0.85 Significance level = 1 – α = 1 – 0.85 = 0.15

Q: What is the relationship between confidence intervals and hypothesis tests?

A: Confidence Interval:Confidence interval is the interval estimate of the population parameter. It is…

Q: A transportation planner wishes to estimate the proportion of commuters who drive to work within…

A: The provided information are: Margin of error (E) = 0.05 Confidence level = 90%

Q: What is meant by saying that a 1−α confidence interval is a. exact? b. approximately correct?

A: a) 1−α confidence interval is Exact means that the probability that the unknown value of population…

Q: The owner of the Gas station wishes to determine the proportion of customers who use credit card. he…

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Q: How can you make a 95% confidence interval smaller without changing the confidence level?

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Q: Melissa wants to estimate the proportion of adults in the U.S. who own a gun. To do so, she surveys…

A: Given information: Sample size of adults is 45, that is, n = 45. Number of adults who own a gun is…

Q: For what type of variable does it make sense to construct a confidence interval about a population​…

A: Qualitative variable: A variable which cannot be measured in numerically is known as a Qualitative…

Q: The Pizza Shop wanted to determine what proportion of its customers ordered an only cheese pizza.…

A: