we have a 95% confidence interval for some parameter. If we were to increase the confidence , say to 99%, what would happen to our interval? That is, what will be the comparison of the interval to the 95% interval (based on the same data). Both interval will be the same width 9% interval will be wider 9% interval will be narrower

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Q: survey to determine if the percentage of adults who use social media has changed from 52%, which was…

A: The sample proportion is computed as follows, The critical value for 96% confidence level, i.e.,…

Q: A study found that for a sample of cars traveling on Interstate 70, the average speed was 70 mph…

A: We have to find margin of error.

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Q: newsgroup is interested in constructing a 99% confidence interval for the proportion of all mericans…

A: Given data,No of americans surveyed is n=586No of were in favor of inititative is x=440Construct 99%…

Q: A random sample of 40 observations was used to estimate the mean SAT scores of applicants at a…

A: We have given that  for a sample of 40 99% confidence interval is (1690,1810)

Q: 2. In the study described in the paper, "Exposure to Diesel Exhaust Induces Changes in EEG in Human…

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Q: The confidence interval for a population mean is (7.36, 7.52). What the the sample mean and the…

A: Solution: Given information: The confidence interval for a population mean μ is ( 7.36, 7.52) Upper…

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A: given information : n1=35,n2=50m1=5.7, m2=6.3s1=1.4 ,s2=1.3 for obtain 99% confidence interval first…

Q: Based on the 95% confidence interval as shown in the picture, write it in interval notation.

A: Based on the given result of 95 % confidence interval, we have to write in interval notations.

Q: An e-business manager wants to estimate the mean exposure to a certain type of internet ads.…

A: The correct option is The confidence interval became longer.

Q: You want to get a 95% confidence interval for the difference between the percentage of females with…

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Q: All other things being equal, would a 95% confidence interval be smaller or larger than a 90%…

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Q: If n = 15, the sample mean = 150, SD = 10, what is the confidence interval (using 99% confidence…

A: Given data,n=15x=150σ=10z-value at 99% confidence is Zc=2.576

Q: the sample proportion of females is  x=118  n=164 P = .720  #1 Make a 95% confidence interval for…

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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: A 95% confidence interval for a population mean was reported to be 152 to 160. If s = 15,what sample…

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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: A confidence interval for the difference in the number of friends that men and women have was found…

A: The formula of the midpoint of the confidence interval formula is,

Q: I was wondering how to find the confidence interval for this data. And how can I get this answer…

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Q: Find a Confidence interval for the true Population Proportions if n = 30,        x = 75, and the…

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Q: A confidence interval for a mean is (-11, 10). This interval would be wider if O The sample mean was…

A: Given  CI for μ is (-11,10) Farmula used Length of CI =2* Zc* s/√n

Q: If a 90%, a 95% and a 99% confidence interval are foung for a population mean, describe how the 3…

A: Population mean CI for known population standard deviation is, CI=x¯±Zσnwhere,σ=population standard…

Q: The mean was found to be 25% and the confidence interval was (20.4%,29.6%) therefore the margin of…

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Q: Given the simple regression model Y = B₁ + B₁X and the regression results that follow, test the null…

A: Givenb)The simple linear regression model is, Y=β0+β1X sample size n=49b1=8.1sb1=1.9

Q: What will be observed if calculated the three confidence intervals at 90%, 95%, and 99%? How would…

A: if three confidence intervals are calculated at 90% 95% 99%

Q: construct a confidence interval for this data. You should construct a 95% confidence interval for…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

Q: In a survey conducted to 415 people it was found that they had walked 5000 meters on average for the…

A: Sample size (n) = 415Sample mean (x̅) = 5000Standard deviations (s) = 900 Confidence level (c) =…

Q: If n = 20, the sample mean = 250, SD = 15, SEM = 3.354, what is the confidence interval (using 95%…

A: The formula for a confidence interval for the population mean μ\mu when the population standard…

Q: e this problem about the confidence interval?

A: average 6 variance 1 If 5 of those wall clocks are observed, then the variance is given as:…

Q: What happens to our range when we increase the confidence level?

A:

Q: You want to get a 90% confidence interval for the difference between the percentage of females with…

A: Obtain the 90% confidence interval for the difference between proportions   The 90% confidence…

Q: Which of the following will increase the size of a confidence interval? Increasing sample size.…

A: Here we have to identity which of the following option increase the size of confidence interval

Q: Fall2020 Score Spring2021 Score Options vars 47 48.5 46 47.5 Two sample T confidence interval: H :…

A: The sample statistic is provided as follows.              Sample n Mean Std. dev.…

Q: From a sample of 500 Pepperdine students, 205 said they commuted to school. Find the 95% confidence…

A: We have given that,  Favorable cases (X) = 205 and sample size     (n) = 500  Then,  We will find…