If n=21, (x-bar)-43, and s-8, find the margin of error at a 95% confidence level Give your answer to two decimal places.

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: Suppose you want to produce an estimate on the percent of students who return to college after their…

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Q: A biologist is studying fish diversity Lake Erie. The biologist knows that Black Carp are an…

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Q: A dataset has the following characteristics: Standard deviation: 100 Sample size: 25 What is the…

A: From given data we have : sd=100 n=25

Q: Why does increasing the confidence level result in a larger margin of error?

A: We know that the Margin of error is directly proportional to the test statistic's critical value,…

Q: Can you please calculate the 95% confidence interval for this problem

A: From the obtained results, the mean of the difference is -2.1 and the standard deviation of the…

Q: What is an approximate 99% confidence interval for the slope of the line of best fit?

A: The provided information is, The 99% Confidence interval can be calculated as,

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: how do you calculate 95% confidence interval for the population mean when the sample mean is 15 and…

A: From the given information ,Sample mean , 15Margin of error , E = 3.2We have to find the 95%…

Q: How do I calculate a 95% confidence level for a sample proportion in excel? Meaning, what formula…

A: Given : Confidence level = CL = 95% = 0.95

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: what are the requirements for using a t-distribution to calculate a 95% confidence interval?

A: Solution-: We want to find what are the requirements for using a t-distribution to calculate a 95%…

Q: Let's say you survey a random sample of 70 people. You ask the people in your survey if they prefer…

A: given data  n = 70 p = 0.53 95% ci for p margin of error (E) = ?

Q: What is the likelihood that a 90% confidence interval will not cover the true population value?…

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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: i need help with the upper 95% confidence interval of the difference

A: We have given the sample mean of difference of scores   X̅=-1.60  with standard deviations  s=1.1402…

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: if for some reason it was not possible to obtain the 99% confidence interval from SPSS, how could…

A: Given information: Confidence level=99%=0.99α=1%=0.01

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: how would i do 19 b with a 95% confidence interval***** not 90%

A: Given Information B) Sample Mean(M) = 77.2 Sample Standard Deviation = 5.7 Sample size(n) = 9…

Q: What is the effect of increasing the confidence level on the margin of error?

A: The formula for calculating the margin of error is,   The margin of error is directly proportional…

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: Why is a 99% confidence interval wider than a 95% confidence interval?

A: The confidence interval formula is sample statistic±Margin of error. The margin of error is the…

Q: What proportion of new drivers fail the written portion of their driver's license examination? You…

A: Given Data: p=196/500=0.392   n=500   z-value corresponding to 95% Confidence level=1.96

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: What happens to the spread of an interval if you increase the confidence level from 90% to 99%?

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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: How do you calculate a confidence interval, and what does it tell you about the population parameter…

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Q: % confidence interval for the mean percentage of airline reservations being canceled on the day of…

A: A 90% confidence interval for the mean percentage of airline reservations being canceled on the day…

Q: A 99% confidence interval is smaller in size than a 95% confidence interval because it is more…

A: Given  A true or false question based on confidence interval.

Q: trying to figure out 80% confidence interval?

A: Computation of critical value: For, 1-α=0.80α=0.20α2=0.101-α2=0.90 The critical value of…

Q: Why are confidence intervals important and what do they mean to a study?

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

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…