Find the critical values Zc that corresponds to an 82% confidence level.

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Solution: From the given information, confidence level is 0.80, p=0.18 and E=0.03.

Q: What is the critical t-value (found in the t-table) if you are making a 90% confidence interval with…

A: Confidence level=90%Sample size(n)=20

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: We have to find given information from available data.

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

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Q: y=95% , Confidence Level = 99% , n = 20- Two-sided Tolerence Interval

A: Givenγ=95%Confidence interval =95%n=20 For any series of measurements let the sample mean and…

Q: In general, individuals ages 9 to 50 should have a sodium intake of 1500 mg (milligrams) per day to…

A: The objective of the question is to interpret the given 90% confidence interval for the mean intake…

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: A 90% confidence interval for the population mean ?is 18 <u< 24, What is the sample mean

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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: What is the critical value for z if you want a 95% confidence interval ( 17 degrees of freedom )?

A: Given Data: Degree of freedom=17 Confidence level=0.95

Q: Other than the typical 90%, 95% and 99% confidence intervals, we may want to work with any other…

A: Note: This critical value calculated from standard normal distribution table at level of…

Q: What is the correct ans.? The change in confidence level (increase, decrease, does not change, none…

A: Solution Confidence level is fixed to find the confidence interval.

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

A: Solution: From the given information, a 90% confidence interval for the mean proportion of airline…

Q: For a 99% confidence level, what are the critical values for one-tailed test? Draw the figure.…

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Q: I want to estimate the average time it takes a tomato plant to bear fruit. I randomly sample 16…

A: Given,sample size(n)=16mean(x¯)=36standard deviation(σ)=17α=1-0.85=0.15α2=0.075Z0.075=1.4395…

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: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: The independent variable is percentage of all complaints that are complaints of identity theft in…

Q: If n=330 and p (p-hat) =0.92, find the margin of error at a 99% confidence level Give your answer to…

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Q: If n=320 and (p-hat) =0.94, find the margin of error at a 95% confidence level Give your answer to…

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Q: Find the critical value zc that corresponds to a 98% confidence level

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Q: ompute the critical value that corresponds to a 96% level of confidence.

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Q: For a confidence level of 90%, find the critical value > Next Question

A: We have to find critical value.

Q: What is the two tailed z critical value for 97% confidence level?

A: Given: Confidence level = 97% = 0.97

Q: Determine from a confidence interval whether a test is significant?

A: Null hypothesis states that there is no difference between populations or a set of given…

Q: Falling coconuts kill over 150 people each year, which is more than the number of people who die…

A: This question asks about the conditions necessary to calculate a confidence interval for the true…

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: How much more sensitive to contrast are athletes with eye grease than without eye grease? Give a 95%…

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Q: How are z and t confidence intervals different? Choose one interval and give an example of how it…

A: Confidence interval for mean: When the sample size is large (n&gt;30) and population variance (or…

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: raw score that is 1.96 blank above the sample mean

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Q: What is the difference in the computation of a confidence interval between cases in which you know…

A: Population standard deviation known: When population standard deviation is known, the z-critical…

Q: An article included data from a survey of a random sample of adults living in the United States. Of…

A: n=sample size=1300 X=700

Q: Find the critical value used for a 98% confidence interval for a proportion. Round to two decimal…

A: The confidence level is , C=98%=98/100=0.98 The level of significance is, For computing critical…

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

A: Given 90% confidence interval is (2.68,9.42)   Lower limit=2.68 Upper limit=9.42 Point estimate p=?

Q: What prerequisites should students have the knowledge of before calculating the confidence intervals…

A: Determine the prerequisites should students have the knowledge of before calculating the confidence…