Homework Answers
It will get Narrower because the margin of error will decrease, and hence the width of the confidence Interval will also get decrease
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Which one is the right one?
Keeping all the other things the same, if there is...
Suppose you construct a 96% confidence interval for a population mean from a normal distribution with...
Suppose you construct a 96% confidence interval for a population
mean from a normal distribution with known
.
Scenario 1: If you increase the size of the sample while keeping
the same 95% level of confidence, how would your confidence
interval be affected? Circle answer.
a. would be wider
b. would be narrower
c. there would be no change
d. no way to know without additional information
Scenario 2: If you increase the level of confidence from 96% to
99%...
If all other quantities remain the same, how does the indicated change affect the width of...
If all other quantities remain the same, how does the indicated change affect the width of a confidence interval? Decrease the confidence level from 99% to 95%: A. The interval will get wider B. The interval will get narrower C. The interval will stay the same
What would happen (other things being equal) to a confidence interval if you calculated a 99%...
What would happen (other things being equal) to a confidence interval if you calculated a 99% confidence interval rather than a 95% confidence interval? Question 11 options: It will not change. It will be wider. It will be narrower.
QUESTION 3 All things being equal, which is correct? As the confidence level increases, the margin...
QUESTION 3 All things being equal, which is correct? As the confidence level increases, the margin of error gets larger. As the sample size increases, the confidence interval gets wider. As the standard deviation increases, the margin of error gets smaller. As the sample mean increases, the margin of error gets larger. Which of the following is correct? As the sample size increases, the confidence level decreases. As the confidence level increases, the width of the confidence interval decreases. As...
If all other quantities remain the same, how does the indicated change affect the width of...
If all other quantities remain the same, how does the indicated change affect the width of a confidence interval? Decrease the sample size from 120 to 90: A. The interval will stay the same B. The interval will get wider C. The interval will get narrower D. Sample size does not have any influence on confidence interval
Use the sample information x¯ = 43, σ = 3, n = 13 to calculate the...
Use the sample information x¯ = 43, σ = 3, n = 13 to calculate the following confidence intervals for μ assuming the sample is from a normal population. (a) 90 percent confidence. (Round your answers to 4 decimal places.) The 90% confidence interval is from to (b) 95 percent confidence. (Round your answers to 4 decimal places.) The 95% confidence interval is from to (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval...
two random samples from the same population have sample sizes of n=35 and n=50. Which of...
two random samples from the same population have sample sizes of n=35 and n=50. Which of the following is true for a 95% confidence interval. A. confidence interval for the sample size n=50 is narrower b. confidence interval for the sample size n=50 is wider c. sample size of n=35 has a greater degree of confidence d. sample size n=50 has a greater degree of confidence e. all of the above
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?...
We have sampled n observations from a normal distribution with known standard deviation σ, and constructed...
We have sampled n observations from a normal distribution with known standard deviation σ, and constructed a 95% confidence interval for μ. If the confidence level is changed to 99%, which of the following choices is correct? Group of answer choices The confidence interval will become wider. The confidence interval will become narrower. The confidence interval will stay the same. In a particular case, any of these choices may be correct.
A random sample of 20 healthy adults eating a traditional American diet is selected. They agree...
A random sample of 20 healthy adults eating a traditional American diet is selected. They agree to adopt a vegetarian diet for 1 month . Based on their 20 sample cholesterol change values, a 95% one-sample t confidence interval for the population mean change in blood cholesterol level after switching diet is reported as the interval -27.9 to -11.6 mg/dl. If we use a matched-pairs t confidence interval in some statistical software with the 20 sample cholesterol values at the...
Suppose you construct a 96% confidence interval for a population
mean from a normal distribution with known
.
Scenario 1: If you increase the size of the sample while keeping
the same 95% level of confidence, how would your confidence
interval be affected? Circle answer.
a. would be wider
b. would be narrower
c. there would be no change
d. no way to know without additional information
Scenario 2: If you increase the level of confidence from 96% to
99%...
QUESTION 3 All things being equal, which is correct? As the confidence level increases, the margin of error gets larger. As the sample size increases, the confidence interval gets wider. As the standard deviation increases, the margin of error gets smaller. As the sample mean increases, the margin of error gets larger. Which of the following is correct? As the sample size increases, the confidence level decreases. As the confidence level increases, the width of the confidence interval decreases. As...
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?...
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