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 include the population parameter.
D The general format of a confidence interval is “population parameter ± margin of error.”
Homework Answers
The correct option is: C
A confidence interval is an interval of values computed from sample data that is likely to include the population parameter.
Add Answer to:
Which of the following statements about confidence intervals is
correct?
A The value of z* you...
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...
33. Find the z-score used in the formula to construct a 92% confidence interval for a...
33. Find the z-score used in the formula to construct a 92% confidence interval for a population proportion: O a. 1.4051 Ob. 1.5548 Oc. 1.7507 Od. 1.96 34. All of the following are TRUE about 95% confidence intervals for a population mean except ::* O a. The population mean may or may not be in the confidence interval. Ob. The value of T varies depending on sample size. Oc. If the sample size is large, the Central Limit Theorem says...
Constructing Confidence Intervals, Part 1: Estimating Proportion Assume that a sample is used to estimate a...
Constructing Confidence Intervals, Part 1: Estimating Proportion
Assume that a sample is used to estimate a population proportion p.
Find the margin of error E that corresponds to the given statistics
and confidence level: In a random sample of 200 college students,
110 had part-time jobs. Find the margin of error for the 98%
confidence interval used to estimate, for the entire population of
college students, the percentage who have part-time jobs. Round
your answer to three decimal places.
Please...
Confidence Intervals 9. Construct a 95 % confidence interval for the population mean, . In a...
Confidence Intervals 9. Construct a 95 % confidence interval for the population mean, . In a random sample of 32 computers, the mean repair cost was $143 with a sample standard deviation of $35 (Section 6.2) Margin of error, E. <με. Confidence Interval: O Suppose you did some research on repair costs for computers and found that the population standard deviation, a,- $35. Use the normal distribution to construct a 95% confidence interval the population mean, u. Compare the results....
3. Question 3 Aa Aa E A confidence interval estimate is an estimate of a population...
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...
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
For each example below you would start to construct a confidence interval by identifying which distribution...
For each example below you would start to construct a confidence interval by identifying which distribution should be used to find the margin of error. It is possible that you won't be able to use either distribution. (a) a confidence interval for a population proportion where n = 66 and there are 63 successes in your sample leading to a sample proportion of 0.955 A. z-distribution B. t-distribution C. neither distribution (b) a confidence interval for a population proportion where...
Confidence intervals are a way to make predictions about entire populations using a random sample. Suppose...
Confidence intervals are a way to make predictions about entire populations using a random sample. Suppose you do not know the value for a certain population mean, such as the average miles per gallon for some new brand of car. You don’t have the data for every single car of this new brand, so you can’t calculate the population mean. However, you can try to estimate it. What value is the point estimate for the population mean? Describe, in your...
Which of the following is the correct interpretation of a 96% confidence level? Multiple Choice There's...
Which of the following is the correct interpretation of a 96% confidence level? Multiple Choice There's a 96% chance that the given interval Includes the true value of the population parameter. Approximately 96 out of 100 such intervals would include the true value of the population parameter. There's a 96% chance that the given interval Includes the true value of the population parameter. Approximately 96 out of 100 such intervals would include the true value of the population parameter. There's...
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...
33. Find the z-score used in the formula to construct a 92% confidence interval for a population proportion: O a. 1.4051 Ob. 1.5548 Oc. 1.7507 Od. 1.96 34. All of the following are TRUE about 95% confidence intervals for a population mean except ::* O a. The population mean may or may not be in the confidence interval. Ob. The value of T varies depending on sample size. Oc. If the sample size is large, the Central Limit Theorem says...
Constructing Confidence Intervals, Part 1: Estimating Proportion
Assume that a sample is used to estimate a population proportion p.
Find the margin of error E that corresponds to the given statistics
and confidence level: In a random sample of 200 college students,
110 had part-time jobs. Find the margin of error for the 98%
confidence interval used to estimate, for the entire population of
college students, the percentage who have part-time jobs. Round
your answer to three decimal places.
Please...
Confidence Intervals 9. Construct a 95 % confidence interval for the population mean, . In a random sample of 32 computers, the mean repair cost was $143 with a sample standard deviation of $35 (Section 6.2) Margin of error, E. <με. Confidence Interval: O Suppose you did some research on repair costs for computers and found that the population standard deviation, a,- $35. Use the normal distribution to construct a 95% confidence interval the population mean, u. Compare the results....
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...
Which of the following is the correct interpretation of a 96% confidence level? Multiple Choice There's a 96% chance that the given interval Includes the true value of the population parameter. Approximately 96 out of 100 such intervals would include the true value of the population parameter. There's a 96% chance that the given interval Includes the true value of the population parameter. Approximately 96 out of 100 such intervals would include the true value of the population parameter. There's...
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...
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