what is measured by a confidence interval and describe the factors that affect the width of a confidence interval?

Q: How to identify the length of confidence interval

A: An Interval's Length :  The definition of the length of a confidence interval is normally…

Q: How to find margin of error and 95% confidence interval?

A: Margin of error:The margin of error helps in constructing confidence intervals, which gives a range…

Q: What is the role of the sample size in the determination of confidence interval? Explain.

A: Let us first define sample size and confidence interval. Sample size: It is determination of the…

Q: Why do we need to compute a confidence interval rather than simply stating a point estimate

A: Whenever we discuss the estimation of an unknown parameter, there is a need for a confidence…

Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 500…

A: The sample proportion of the sample of size n can be defined as:  Here, X = Total number of success…

Q: What is a Confidence Level? what is one example of the use of the Confidence Interval?

A: A level of confidence refers to the percentage of all possible samples which the true population…

Q: Explain which would result in a wider large-sample confidence interval for : a 90%pconfidence level…

A: The z critical value for 95% confidence interval is 1.96 and the z-critical value for 90% confidence…

Q: What is the impact of increasing the confidence level for a confidence interval? Makes the interval…

A: We are assuming that all other things are constant.   Confidence Interval is range that contains all…

Q: When computing a confidence interval and the interval includes the numbers zero,what does this mean…

A: When computing a confidence interval and the interval includes the numbers zero,what does this mean…

Q: You are told that a survey produced a 90% confidence interval for the mean spent on utilities per…

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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: 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: oning in

A: To determine if the confidence interval supports the claim, check if the claimed population…

Q: What is the 99% confidence interval? [ [smaller value, larger value]

A: Given : n=1000 , X=518  , α=0.01 The estimate of the sample proportion is ,…

Q: Unlike confidence intervals, hypothesis tests require that some predetermined population value be…

A: The confidence intervals, provide the range where the population mean or parameter will remain in…

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: What is the difference between confidence interval of population and a population proportion

A: A confidence interval is a type of estimate computed from the statistics of the observed data. This…

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: What are the the conditions for the confidence interval to be valid?

A: Given that: Mean response of 300 students and survey result give a 95% confidence interval for mean.…

Q: Explain why and when t statistic is used in constructing a confidence interval for the mean of a…

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Q: What are confidence intervals?

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Q: What is the difference between a prediction interval and a confidence​ interval? And when is it…

A: Confidence Interval :  Confidence intervals tell you how well you have determined a parameter of…

Q: How tp use a sample mean to calculate a confidence interval?

A: The equation for confidence interval can be stated as:

Q: How can we interpret a 95% confidence interval?

A: How to interpret a 95% confidence Interval?  We know that,  Confidence Interval is defined as the…

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

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Q: Explain "Plus Four" Confidence Interval for p

A: There are a number of issues that must be addressed when constructing confidence intervals for…

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: What is the correct answer? The change in confidence level (increase, decrease, does not change,…

A: We want to tell you which one is the correct choice

Q: Describe about the INTERPRETATION OF A CONFIDENCE INTERVAL.

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

Q: Does the confidence interval not change for population proportion vs sample proportion

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Q: Describe how a Confidence Interval might be a better piece of information to report from a study…

A: Confidence intervals provide information about a range in which the true value lies with a certain…

Q: is a confidence interval and how do we calculate it

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

Q: Would it be reasonable to develop a confidence interval from these data to show the mean number of…

A: John is interested to know the number of hours children under 12 years if age watched TV per day.…

Q: What critical values would you use to calculate the 90% confidence interval if your sample size is…

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Q: How can a confidence interval be used to test a hypothesis?

A: How can a confidence interval be used to test a hypothesis?

Q: What is the effect on the size of the confidence interval if a T score is used instead of a Z score?…

A: The value of t is larger for smaller sample sizes i.e., lower df. When we use "t" instead of "Z" in…

Q: In a taste comparison test, it was found that 56 of the 100 persons in a sample preferred the chunky…

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Q: How to test hypotheses and how to construct confidence intervals for the difference in the means?

A: Hypothesis testing can be conducted in two ways: Critical value approach. P-value approach. The…

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

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Q: What is the 95% confidence interval for population proportion?

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Q: Explain what happens when finding the margin of error if all stays the same except that the…

A: Conditions with respect to confidence interval and the margin of error:   As the confidence level…

Q: Explain how to find a confidence interval for a population proportion using StatCrunch.

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Why is it that when we increase our confidence level in a confidence interval that the interval gets…

A: Confidence inteval is calculated with mean/proportion and standard error. While the value of…

Q: What is a confidence interval

A: The confidence interval in statistics is a type of estimation computed from the statistics of the…

Q: What does a confidence interval for m indicate? When do we compute a confidence interval?

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