Keeping all else the same, is a 95% confidence interval narrower or wider than a 90 confidence interval? As n increases, it becomes Keeping all the same, is a 95% confidence interval for n=100 narrower OR wider than a 95% confidence interval for n-200?

Q: we have a 95% confidence interval for some parameter. If we were to increase the confidence , say to…

A: If increases the confidence level then what happened in width of C.I.

Q: Define why a confidence interval makes clear that one should not accept the null hypothesis

A: Despite the size of the sample, it is not possible for an individual to conclude that the null…

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: The Diabetic Association of Pakistan sampled 4900 severely overweight Pakistanis between 20 and 59…

A: Given,sample size(n)=4900sample proportion(p^)=0.171-p^=1-0.17=0.83α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: Suppose you wish to estimate the proportion of regular soft drink consumers who prefer your…

A: Maximum width = 0.06  Confidence interval = 90% .  Level of significance = 0.10  For Confidence…

Q: We want to estimate the proportion of vegetarian restaurants in a country. We observe 20 such…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: Whenever an effect is significant, all values in the confidence interval will move in which…

A: The confidence level indicates the possibility that the confidence interval contains the population…

Q: A new drug for migraine headaches has been introduced to the market. You would like to know if…

A:

Q: You suspect minority students are not as supportive of the new principal of a large school because…

A: given n1=56, x1=45 n2=33, x2=21

Q: Exercise 19. Why are narrow confidence intervals better than wide ones? Discuss how n, o², and a…

A: Confidence intervals are used to estimate the range of values in which the true population parameter…

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: To make an 80% confidence interval ,which bootstrap percentiles must benused Use the  percentile…

A: Given Data: To Find: 80% Confidence Interval   80% Confidence Interval means the data lies in the…

Q: Pew research reported in 2013 that 15% of American adults do not use the internet or e-mail. They…

A: This question asks about the meaning of a margin of error reported by Pew Research in 2013 for a…

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 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: McDonald's conducted research about the proportion of their egg muffin buyers who also order a cup…

A:

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: In an effort to improve the virtual learning environment, several professors conducted a survey for…

A: The given information is that, the sample of 115 lectures, among 80 lectures like to receive…

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

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 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: he lower end of the 95% confidence interval is Question Blank 1 of 2and the higher end of the 95%…

A: n=8 Sample sizex= 9.8 Sample mean s= 0.4 Sample standard deviation

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: people from Tanjung Malim has been given cholesterol tests, and 60 of these people had levels over…

A: We have given that,  Favorable cases (X) = 60 and sample size (n) = 150 Then,  We will find the 95%…

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: Suppose we take a SRS of high school seniors and get a 95% confidence interval that 250 to 278…

A:

Q: The first day of baseball comes in late March, ending in October with the World Series. Does fan…

A: given that,sample one,  n1 =1001, p1= x1/n1=0.45sample two,  n2 =1001, p2= x2/n2=0.51

Q: I know how to do the first part, I am curious how to get the 95% confidence interval on part 6.

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Q: You are interested in studying whether students living in the dorms or students living off campus…

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

Q: 7. Why is a confidence interval also called a "margin of error"?

A: Margin of error allows us to feel confident a certain percentage of the time within a range of…

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: 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: 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>30) and population variance (or…

Q: As the sample standard deviation increases when all other parts of the confidence interval stay the…

A: We want tell the sample standard deviation increases when all other parts of the confidence interval…

Q: During the recovery from the great Recession of 2007-2009, the economic situation for many families…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Why do we add a +1 to some transformations. Because NAS in the data can prevent transformations.…

A: a+1 to some transformations like log, if there is 0, so applying log on zero results in undefined so…

Q: McDonald's conducted research about the proportion of their egg muffin buyers who also order a cup…

A:

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…

Q: The American Heart Association is about to conduct in anti smoking campaign and wants to know the…

A: Solution: Out of a sample of 1421 Americans over 35, 412 smoke.  Sample size: n = 1421 The number of…

Q: The values in the middle of a confidence interval are more likely to be the true value for the…

A:

Q: If the confidence interval for the difference between two treatment means does not contain , then we…

A: If the confidence interval for the difference between the treatment means does not contain the value…

Q: Describe the circumstances under which a confidence interval and hypothesis test yield the same…

A: Explanation to 1 (Matching Significance Level and Confidence Level)To obtain a similar result, the…

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

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.