Homework Answers
The error bound for a population mean (abbreviated EBM) is largest when the population standard deviation is highest i.e. when the population standard deviation is 20.
error bound = sqrt (standard deviation / n)
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Suppose we are interested to construct a 95% confidence interval of the mean exam score. A...
Use the standard nomal distribution or the distribution to construct a 95% confidence interval for the...
Use the standard nomal distribution or the distribution to construct a 95% confidence interval for the population mean. Justily your decisioni neither distribution can be used, explain why. Interpret the results In a random sample of 41 people, the mean body mass index (BMI) was 27.8 and the standard deviation was 6.11 Which distribution should be used to construct the confidence interval? Choose the correct answer below. O A Use a distribution because the sample is random, na 30, and...
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....
Show Work a Construct a 95% confidence interval for the population standard deviations of a random...
Show Work a Construct a 95% confidence interval for the population standard deviations of a random sample of 15 crates which have a mean weight of 165 2 pounds and a standard deviation of 11.6 pounds. Round to the nearest thousandth. Assume the population is normally distributed O.A. (8.493,18.294) O B. (8.918,16.932) OC (2.494,5.371) OD. (72.125,334.667) Jick to select your answer. Sample tests and quizzes can be taken for practice or to build your study plan. Sample tests and quizzes...
When planning to construct a 95% confidence interval for a population mean such that it is...
When planning to construct a 95% confidence interval for a population mean such that it is within one eighth (population) standard deviation from a sample mean, what is the minimum sample size required?
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...
1. construct a 95% confidence interval where standard deviation is 15 and mean is 99.133 2....
1. construct a 95% confidence interval where standard deviation is 15 and mean is 99.133 2. construct a 95% confidence interval where standard deviation is 15 and mean is 99 3. construct a 95% confidence interval where standard deviation is 15 and mean is 98.625 i want to add that the population mean is 100 question 1- sample size is 8 question 2- sample size is 20 question 3- sample size is 30
Construct a 95% confidence interval for the mean weight of all new Ford Mustangs if a...
Construct a 95% confidence interval for the mean weight of all new Ford Mustangs if a random sample of 40 of these automobiles had a mean weight of 3,200 pounds. Assume from previous studies that the population standard deviation is 160 pounds. PLEASE SHOW WORK AND CLEARLY THANK YOU MEANING THE CONFIDENCE INTERVAL
Use the given degree of confidence and sample data to construct a confidence interval for the...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean y Assume that the population has a normal distribution Thirty randomly selected students took the calculus final the sample mean was 90 and the standard deviation was 5.1. construct a 90% confidence interval for the mean score of all students. Round to be decimal places O A 87.44 <<92.56 OB. 87.71 <<92.29 OC 8743<<92.57 OD 8842 <<91.58
Use the given degree of confidence and sample data to construct a confidence interval for the...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean H. Assume that the population has a normal distribution. Thirty randomly selected students took the calculus final. If the sample mean was 82 and the standard deviation was 12.6, construct a 99% confidence interval for the mean score of all students. Round to two decimal places. O A. 75.68 < < 88.32 OB. 75.66<u < 88.34 OC. 78.09 < < 85.91 OD....
Suppose there is a population of test scores on a large, standardized exam for which the...
Suppose there is a population of test scores on a large, standardized exam for which the mean and standard deviation are unknown. Two different random samples of 50 data values are taken from the population. One sample has a larger sample standard deviation (SD) than the other. Each of the samples is used to construct a 95% confidence interval. How do you think these two confidence intervals would compare?
Use the standard nomal distribution or the distribution to construct a 95% confidence interval for the population mean. Justily your decisioni neither distribution can be used, explain why. Interpret the results In a random sample of 41 people, the mean body mass index (BMI) was 27.8 and the standard deviation was 6.11 Which distribution should be used to construct the confidence interval? Choose the correct answer below. O A Use a distribution because the sample is random, na 30, and...
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....
Show Work a Construct a 95% confidence interval for the population standard deviations of a random sample of 15 crates which have a mean weight of 165 2 pounds and a standard deviation of 11.6 pounds. Round to the nearest thousandth. Assume the population is normally distributed O.A. (8.493,18.294) O B. (8.918,16.932) OC (2.494,5.371) OD. (72.125,334.667) Jick to select your answer. Sample tests and quizzes can be taken for practice or to build your study plan. Sample tests and quizzes...
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...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean y Assume that the population has a normal distribution Thirty randomly selected students took the calculus final the sample mean was 90 and the standard deviation was 5.1. construct a 90% confidence interval for the mean score of all students. Round to be decimal places O A 87.44 <<92.56 OB. 87.71 <<92.29 OC 8743<<92.57 OD 8842 <<91.58
Use the given degree of confidence and sample data to construct a confidence interval for the population mean H. Assume that the population has a normal distribution. Thirty randomly selected students took the calculus final. If the sample mean was 82 and the standard deviation was 12.6, construct a 99% confidence interval for the mean score of all students. Round to two decimal places. O A. 75.68 < < 88.32 OB. 75.66<u < 88.34 OC. 78.09 < < 85.91 OD....
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