The confidence level in a confidence interval for µ is: A) the probability that the interval...
The confidence level in a confidence interval for µ is:
A) the probability that the interval contains µ
B) the probability that the interval does not contain µ
C) the probability of Type I error for the associated hypothesis testing problem
D) the probability of Type II error for the associated hypothesis testing problem
E) the approximate proportion of intervals which contains µ when a large number confidence intervals ins contained by repeating the sampling experiment
Homework Answers
The correct answer is
E : the approximate proportion of intervals that contains µ when a large number of confidence intervals ins contained by repeating the sampling experiment.
It is refers to the percentage of all possible samples that can be expected to include the true population parameter.
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The confidence level in a confidence interval for µ is:
A) the probability that the interval...
19. When calculating a confidence interval, keeping the sample size the same but decreasing the confidence level, will a. decrease the width of the confidence interval b. decrease the margin of error...
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3. Question 3 Aa Aa E A confidence interval estimate is an estimate of a population...
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Which statement is NOT true about confidence intervals? A) A confidence interval is an interval...
Which statement is NOT true about confidence intervals? A) A confidence interval is an interval of values computed from sample data that is likely to include the true population value B) An approximate formula for a 95% confidence interval is sample estimate ± margin of error. C) A confidence interval between 20% and 40% means that the population proportion lies between 20% and 40% D) A 99% confidence interval procedure has a higher probability of producing...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ =...
Suppose the null hypothesis is Ho : µ = 500 against Ha : > µ = 500 , and the significance level for this testing is 0.05. The population in question is normally distributed with standard deviation 100. A random sample of size n=25 will be used. If the true alternative mean is 550, then the probability of committing the type II error is ____.
Translate the statement into a confidence interval. Approximate the level of confidence In a survey of...
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You read that a statistical test at the α=0.01 level has probability 0.14 of making a...
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You read that a statistical test at the α=0.01 level has probability 0.14 of making a...
You read that a statistical test at the α=0.01 level has probability 0.14 of making a Type II error when a specific alternative is true. What is the power of the test against this alternative? Suppose we tested the null hypothesis that the weight of a McDonald's quarter pounder is 0.25 pounds (H0 : µ = 0.25) against the alternative that the weight is below 0.25 pounds (Ha : µ < 0.25). After collecting a sample our observed z statistic...
1.) low level of confidence for a confidence interval would mean a low chance of a...
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Distributions Cars Frequencies Confidence Intervals Level Count Prob 7 0.11667 28 0.46667 17 0.28333 8 0.13333...
Distributions Cars Frequencies Confidence Intervals Level Count Prob 7 0.11667 28 0.46667 17 0.28333 8 0.13333 Total 60 1.00000 N Missing 0 4 Levels Level Count Prob Lower CI Upper CI 1-Alpha 7 0.11667 0.057677 0.221788 0.950 28 0.46667 0.346279 0.591066 0.950 17 0.28333 0.185068 0.407673 0.950 8 0.13333 0.069141 0.241652 0.950 Total 60 Note: Computed using score confidence intervals. here to access the JMP applet in a new window. (a) The most common number of cars per family is...
5. When constructing a confidence interval, the confidence level is A. another name for the margin...
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19. When calculating a confidence interval, keeping the sample size the same but decreasing the confidence level, will a. decrease the width of the confidence interval b. decrease the margin of error c. make us less sure that our confidence interval contains the true parameter d. all of the above 20. A research company polled a random sample of 799 U.S. teens about internet use.0.49 of those teens reported that they had misrepresented their age online to gain access to...
3. Question 3 Aa Aa E A confidence interval estimate is an estimate of a population parameter providing an interval that is believed (with a certain level of confidence) to contain the value of the population parameter. The confidence level is the level of confidence associated with the confidence interval estimate. If your confidence level is 94%, then if you were to employ repeated sampling and compute the confidence interval estimate for each sample, you would expect % of the...
Translate the statement into a confidence interval. Approximate the level of confidence In a survey of 1038 adults in a country, 77% said being able to speak the language is at the core of national identity. The survey's margin of error is +3.8% The confidence interval for the proportion is (0.732.0.808) (Round to three decimal places as needed.) The interval is a % confidence interval. (Round to one decimal place as needed.)
Distributions Cars Frequencies Confidence Intervals Level Count Prob 7 0.11667 28 0.46667 17 0.28333 8 0.13333 Total 60 1.00000 N Missing 0 4 Levels Level Count Prob Lower CI Upper CI 1-Alpha 7 0.11667 0.057677 0.221788 0.950 28 0.46667 0.346279 0.591066 0.950 17 0.28333 0.185068 0.407673 0.950 8 0.13333 0.069141 0.241652 0.950 Total 60 Note: Computed using score confidence intervals. here to access the JMP applet in a new window. (a) The most common number of cars per family is...
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