how to determine what confidence level to use when constructing a confidence interval for a 2 sample t test?
how to determine what confidence level to use when constructing a confidence interval for a 2 sample t test?
Homework Answers
In the question of the 2 sample t-test, you will be provided
with the information that you have to construct, say, 95%
confidence interval. So for this question, the level of confidence
would be 95/100 = 0.95 and the level of significance (
The level of significance value can then be used to calculate the
critical value in the "margin of error" part of the confidence
interval.
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how to determine what confidence level to use when constructing a confidence interval for a 2 sample t test?
Procedures for constructing a confidence interval for a sample mean are given in section 7-2 on...
Procedures for constructing a confidence interval for a sample mean are given in section 7-2 on page 319. Example 2 worked on pages 320 and 321 can guide us. In my homework problem 40, the scenario is data on the salaries of 61 players on a football team. We are given that we are interested in the 95% confidence level and the population standard deviation is 3723 thousand dollars. From section 7-2, we know that to be able to use...
5. When constructing a confidence interval, the confidence level is A. another name for the margin...
5. When constructing a confidence interval, the confidence level is A. another name for the margin of error. B. a measure of your personal confidence that you engaged in the correct calculations. C. the probability that the sample statistic is in your computed interval D. the probability that the interval will capture the true parameter value in repeated sa E. the standard deviation of the sampling distribution mples.
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard...
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
If you are constructing a confidence interval for a population mean, for the same confidence level,...
If you are constructing a confidence interval for a population mean, for the same confidence level, the width of the confidence interval will __________ as the sample size increases. Decrease Increase Stay the same Depends on the sample size
The larger the confidence level used in constructing a confidence interval estimate of the population mean,...
The larger the confidence level used in constructing a confidence interval estimate of the population mean, the wider the confidence interval. True False
Use the confidence level and sample data to find a confidence interval for estimating the population...
Use the confidence level and sample data to find a confidence interval for estimating the population u. Round your answer to the same number of decimal places as the sample mean. 20) A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 20) 5.2 on a placement test. What is the 90% confidence interval for the mean score,, of all students taking the test? A) 27.8 <u <31. 2 B ) 28.2<u<30....
In constructing and a 99% confidence interval of the population proportion at the given level of...
In constructing and a 99% confidence interval of the population proportion at the given level of confidence. x = 195, n = 300, what is the margin of error.
We use the t distribution to construct a confidence interval for the population mean when the...
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find t??2,df for the following scenarios. Use Table 2. (Round your answers to 3 decimal places.) t?/2,df a. A 90% confidence level and a sample of 21 observations. b. A 95% confidence level and a sample of 21 observations. c. A 90% confidence level and a...
Constructing Confidence Intervals. In Exercises 21-24, use the sample data and confi- dence level to construct...
Constructing Confidence Intervals. In Exercises 21-24, use the sample data and confi- dence level to construct the confidence interval estimate of the population proportion p. 21. n = 500, x = 200, 95% confidence 22. n = 1200, x = 800, 99% confidence 23. n = 1068, x = 267,98% confidence
QUESTION 4 Which distribution would you make use of when constructing a confidence interval given the...
QUESTION 4 Which distribution would you make use of when constructing a confidence interval given the following information: Sample mean is 9.4, sample standard deviation is 7.8, sample is size is 100. A. Both B. Neither ОСТ D. Normal
5. When constructing a confidence interval, the confidence level is A. another name for the margin of error. B. a measure of your personal confidence that you engaged in the correct calculations. C. the probability that the sample statistic is in your computed interval D. the probability that the interval will capture the true parameter value in repeated sa E. the standard deviation of the sampling distribution mples.
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
Use the confidence level and sample data to find a confidence interval for estimating the population u. Round your answer to the same number of decimal places as the sample mean. 20) A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 20) 5.2 on a placement test. What is the 90% confidence interval for the mean score,, of all students taking the test? A) 27.8 <u <31. 2 B ) 28.2<u<30....
Constructing Confidence Intervals. In Exercises 21-24, use the sample data and confi- dence level to construct the confidence interval estimate of the population proportion p. 21. n = 500, x = 200, 95% confidence 22. n = 1200, x = 800, 99% confidence 23. n = 1068, x = 267,98% confidence
QUESTION 4 Which distribution would you make use of when constructing a confidence interval given the following information: Sample mean is 9.4, sample standard deviation is 7.8, sample is size is 100. A. Both B. Neither ОСТ D. Normal
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