Of the following general derivations, choose the formula that you need for computing a confidence interval:...
Of the following general derivations, choose the formula that you need for computing a confidence interval: Select one: a. Confidence interval = sample statistic + margin of error b. Confidence interval = sample statistic + standard deviation c. Confidence interval = population parameter + margin of error d. Confidence interval = population parameter + standard deviation
Homework Answers
Here option A is correct i.e. sample statistic + margin of error
As confidence inrerval does not include any population parameter .
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Of the following general derivations, choose the formula that
you need for computing a confidence interval:...
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.
1. A C level confidence interval is described as what? (3 points) Oan interval computed from...
1. A C level confidence interval is described as what? (3 points) Oan interval computed from a data sample by a method that has the probability C of producing an interval containing the true value of the parameter any interval within the margin of error O an interval with a margin of error C that is also correct C% of the time Oany interval that follows the 68-95-99.7 rules Oan interval computed from a data sample that guarantees that the...
1) For the following prompts, choose either INCREASE, DECREASE, OR UNCERTAIN to correctly complete the sentences....
1) For the following prompts, choose either INCREASE, DECREASE, OR UNCERTAIN to correctly complete the sentences. (3pts each) a. All else held constant, an increase in the sample size will the margin of error of a confidence interval of u when the population parameter o is unknown. b. When testing a hypothesis using the "critical z approach", an increase in the value of a will the critical z value, holding everything else constant. C. All else held constant, an increase...
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...
Which of the following statements about confidence intervals is correct? A The value of z* you...
Which of the following statements about confidence intervals is correct? A The value of z* you use when constructing a confidence interval will affect where the center of the interval is. B If you construct a confidence interval for a population proportion and the interval ends up being from 0.20 to 0.40, this means the population proportion is definitely between 0.20 and 0.40. C A confidence interval is an interval of values computed from sample data that is likely to...
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin...
To calculate a confidence interval, the margin of error (E) must first be calculated. The Margin of Error, E, for means is: E = 1.96*s/sqrt(n), where s is the sample standard deviation, n is the sample size. The “sqrt” stands for square root. The Margin of Error, E, for proportions is: E = 1.96*sqrt[p*(1-p)/n], where s is the sample standard deviation, n is the sample size, and p is the proportion. Use the Confidence Interval formula above, and the correct...
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate...
QUESTION 21 If we change a 90% confidence interval estimate to a 99% confidence interval estimate while holding sample size constant, we can expect a. the width of the confidence interval to increase. b. the width of the confidence interval to decrease. c. the width of the confidence interval to remain the same. d. the sample size to increase. QUESTION 22 Which one of the following is a correct statement about the probability distribution of a t random variable? a....
For each of the following scenarios, give notation for the sample statistics and population parameter being...
For each of the following scenarios, give notation for the sample statistics and population parameter being estimated. Use the information provided to construct a 99% confidence interval. Write the interval in terms of population parameter. a. In a random sample of 100 families, 67 families have at least one dog. - Sample statistic is _________________________ - Population parameter is _________________________ - Calculate the Standard Error - Confidence Interval: b. In the sample of 61 dog owners, the average veterinary expenditure...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error equals$5, standard deviation equals$19 The required sample size is __.
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error =$5,standard deviation=$25 The required sample size is ????? (Round up to the nearest whole number as needed.)
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.
1. A C level confidence interval is described as what? (3 points) Oan interval computed from a data sample by a method that has the probability C of producing an interval containing the true value of the parameter any interval within the margin of error O an interval with a margin of error C that is also correct C% of the time Oany interval that follows the 68-95-99.7 rules Oan interval computed from a data sample that guarantees that the...
1) For the following prompts, choose either INCREASE, DECREASE, OR UNCERTAIN to correctly complete the sentences. (3pts each) a. All else held constant, an increase in the sample size will the margin of error of a confidence interval of u when the population parameter o is unknown. b. When testing a hypothesis using the "critical z approach", an increase in the value of a will the critical z value, holding everything else constant. C. All else held constant, an increase...
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