What happened to the confidence intervals when the level of confidence increased to 99%? (The first scenario is using 95% level of confidence)

Q: 7. (Sec. 7.2) In a survey of 2004 American adults, 501 of them said that they believed in astrology…

A: Introduction:The 100 (1 – α) % confidence interval for the population proportion, π is: (p – (zα/2­)…

Q: (a) Number of successes x= 135 (b) n = 640 (c) Probability of success p'= 0.21 (d) Probabilty of…

A: Given that  135 of the 640 96% confidence interval

Q: A student reported a 95% confidence interval of [3.21,4.29] What is the mean of the data set?…

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Q: Construct a 95% confidence interval for the proportion of adults from the East who say traffic…

A: n = 400 p = 0.34

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A: From the given information, the 95% confidence interval is (520, 560).   The lower limit is 520 and…

Q: What confidence interval will have the larger margin of error when using the same sample data and…

A: Since we know that, Confidence interval = the estimate ± the margin of error Margin of error is…

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: Express the confidence interval mathematically. Do not round answers.

A: Let  be the population mean number of hours adults work each week.Given that,Sample size Sample mean…

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

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Q: The population mean of a set of data is unknown. The sample mean is 44, and the error bound for the…

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Q: Find the critical value for an 81% confidence interval when the sample is 6. (Round your answer to…

A: It is required to find the critical value for an 81% confidence interval for n=6. This can be done…

Q: Everything else being equal, a population with a higher mean yields a confidence interval that is…

A: As the formula for confidence interval is: CI=X±Zsn Where: X = Mean of the data's Z = Z-value…

Q: What will happen other things being equal if you increase the confidence level for a given…

A: The objective of the question is to understand the impact of increasing the confidence level on the…

Q: (b) Data collected in an earlier study suggest that the mean in 2000 was 6.93 years. A sociologist…

A: From the provided information,sample size (n) = 844sample mean (x̄) = 8.54standard deviation (s) =…

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

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Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

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

Q: "Calculating a confidence interval provides you with an indication of how reliable your sample mean…

A: The degree of confidence is the likelihood that the confidence interval will include the true mean…

Q: 8. A confidence interval for estimating the mean An industrial/organizational psychologist wants to…

A: Obtain the estimated standard error. The value of the estimated standard error is obtained below as…

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A: We have to find p value for given testing.

Q: A study found a confidence interval on the proportion of children that are hearing impaired was 0.04…

A: Given confidence interval is 0.04 to 0.16 i.e., p-E=0.04 -->1 p+E=0.16 -->2

Q: lution is incorrect since the  confidence level is 90% margin of error is 3%

A: Given: Confidence level = 0.90 Margin of error (E) = 0.03 Assumed sample proportion  p^     = 0.50

Q: Hello, can you please help me solve this question ? This is a confidence interval level question :…

A: Confidence interval: The (1-α) % confidence interval for proportion p is given by,

Q: An analyst constructed a confidence interval for the amount of product yielded in a batch run by…

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Q: Suppose you compute a 96% confidence interval. What will happen to the confidence interval if you…

A: IF YOU DECREASE THE CONFIDENCE LEVEL FROM 96% T0 94%,DECREASES THE ERROR BOUND AND MAKES THE…

Q: probability of a Type I error?

A: Here given , confidence interval changes to  90% to 99%

Q: If there was a 95% confidence interval of say, (0.48, 0.68), about a product being preferred by…

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

Q: Describe when you would use a t-score instead of a z-score when finding a confidence interval.

A: Describe in what conditions t-score would be used instead of a z-score when finding a confidence…

Q: poll reported that only 645 out of a total of 2029 adults in a particular region said they had a​…

A: According to the given information in this question We need to construct 80% confidence interval

Q: Z-score for an 88% confidence level

A: The objective of the question is to find the Z-score for an 88% confidence level. The Z-score, also…

Q: True or False  Q: If a 95% confidence interval for the difference in two independent means is (-4.5…

A: Given 95% confidence interval is (-4.5,2.1) Point estimate is given by

Q: A random survey of 705 elderly men, aged 70 and more, was taken and 14.6% were found to have Type 2…

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

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