Which must be true about a 95% confidence interval based on a given sample? I. The...
Which must be true about a 95% confidence interval based on a given sample?
I. The interval is wider than a 99% confidence interval would be.
II. The interval contains 95% of the population.
III. The interval is narrower than a 90% confidence interval would be.
Homework Answers
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Which must be true about a 95% confidence interval based on a
given sample?
I. The...
Which of the following statements about confidence intervals are true? I. A 95% confidence interval will...
Which of the following statements about confidence intervals are true? I. A 95% confidence interval will contain the true µ 95% of the time. II. If ?(|?̅ − µ| > 3) = 0.035. Then a value of µ that is 3 or less units away from ?̅ will be included in the 99% confidence interval. III. The point estimate ?̅ will be included in a 99% confidence interval.
what i currently have is wrong...thanks in advance! A 95% confidence interval for a population proportion...
what i currently have is wrong...thanks in advance!
A 95% confidence interval for a population proportion was constructed using a sample proportion from a random sample. Which of the following statements are correct? Select all that apply If we were to use a 90% confidence level, the confidence interval from the same data would produce an interval wider than the 95% confidence interval. There is a 95% chance that the 95% confidence interval actually contains the population proportion. We don't...
A 95% confidence interval obtained from a sample of 100 outpatients for the true population mean...
A 95% confidence interval obtained from a sample of 100 outpatients for the true population mean normal mean systolic blood pressure is given by (114 mmHG, 120 mmHG). A) Find 99% Confidence Interval B) Can you tell how much would it be wider compare to 95% Confidence Interval? Mention all the steps for the both answers.
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...
3. A 95% confidence interval for a population proportion yielded the interval (.245, .355). Compute the...
3. A 95% confidence interval for a population proportion yielded the interval (.245, .355). Compute the margin of error. Compute the sample proportion. Will a 99% confidence interval be wider or narrower? Explain why or why not.
Each of the following is a confidence interval for μ = true average (i.e., population mean)...
Each of the following is a confidence interval for μ = true
average (i.e., population mean) resonance frequency (Hz) for all
tennis rackets of a certain type:
I will rate the answer, thank
you!
6. -110 points DevoreStat9 7.E.002. My Notes Ask Your Teacher Each of the following is a confidence interval for μ = true average (ie, population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (113.6, 114.4) (113.4, 114.6) (a) What is the value...
11. [6 points] Using a sample of 100 children, a 95% confidence interval for the proportion...
11. [6 points] Using a sample of 100 children, a 95% confidence interval for the proportion of children under the age of 18 who had asthma was constructed to be (0.085,6.23) a) Which of the following would produce a confidence interval which is narrower than the constructed 95% confidence interval? Sample 150 children rather than 100, (Maintain the confidence level at 95%) Sample only 80 children rather than 100, (Maintain the confidence level at 95%) . (b) Which of the...
At a confidence level of 95% a confidence interval for a population proportion is determined to...
At a confidence level of 95% a confidence interval for a population proportion is determined to be 0.65 to 0.75. If the sample size had been larger and the estimate of the population proportion the same, this 95% confidence interval estimate as compared to the first interval estimate would be Group of answer choices narrower. the same. wider.
Each of the following is a confidence interval for u = true average (i.e., population mean)...
Each of the following is a confidence interval for u = true average (i.e., population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (117.6, 118.4) (117.4, 118.6) (a) What is the value of the sample mean resonance frequency? Hz (b) Both intervals were calculated from the same sample data. The confidence level for one of these intervals is 90% and for the other is 99%. Which of the intervals has the 90% confidence level, and why?...
Consider a normal population distribution with the value of known. a) What is the confidence...
Consider a normal population distribution with the value of
known. a) What is the confidence level for the interval (i) x
1.96 n (ii) x 2.65 n (iii) x 3.34 n b) What value of z in
the confidence interval formula x z n x z n 2 2 ,
results in a confidence level of (i) 97.96% (ii) 78.88% (iii)
99.94% c) Would a 90% C.I. be narrower...
what i currently have is wrong...thanks in advance!
A 95% confidence interval for a population proportion was constructed using a sample proportion from a random sample. Which of the following statements are correct? Select all that apply If we were to use a 90% confidence level, the confidence interval from the same data would produce an interval wider than the 95% confidence interval. There is a 95% chance that the 95% confidence interval actually contains the population proportion. We don't...
Each of the following is a confidence interval for μ = true
average (i.e., population mean) resonance frequency (Hz) for all
tennis rackets of a certain type:
I will rate the answer, thank
you!
6. -110 points DevoreStat9 7.E.002. My Notes Ask Your Teacher Each of the following is a confidence interval for μ = true average (ie, population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (113.6, 114.4) (113.4, 114.6) (a) What is the value...
11. [6 points] Using a sample of 100 children, a 95% confidence interval for the proportion of children under the age of 18 who had asthma was constructed to be (0.085,6.23) a) Which of the following would produce a confidence interval which is narrower than the constructed 95% confidence interval? Sample 150 children rather than 100, (Maintain the confidence level at 95%) Sample only 80 children rather than 100, (Maintain the confidence level at 95%) . (b) Which of the...
Each of the following is a confidence interval for u = true average (i.e., population mean) resonance frequency (Hz) for all tennis rackets of a certain type: (117.6, 118.4) (117.4, 118.6) (a) What is the value of the sample mean resonance frequency? Hz (b) Both intervals were calculated from the same sample data. The confidence level for one of these intervals is 90% and for the other is 99%. Which of the intervals has the 90% confidence level, and why?...
Consider a normal population distribution with the value of
known. a) What is the confidence level for the interval (i) x
1.96 n (ii) x 2.65 n (iii) x 3.34 n b) What value of z in
the confidence interval formula x z n x z n 2 2 ,
results in a confidence level of (i) 97.96% (ii) 78.88% (iii)
99.94% c) Would a 90% C.I. be narrower...
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