Consider a normal population distribution with the value of o known.A USE SALT(a) What is the confidence level for the interval x + 2.880/Vn? (Round your answer to one decimal place.)(b) What is the confidence level for the interval xt 1.43a/Vn? (Round your answer to one decimal place.)(c) What value ofin the CI formula below results in a confidence level of 99.7%? (Round your answer to two decimal places.)(d) Answer the question posed in part (c) for a confidence level of 70%. (Round your answer to two decimal places.)

Answered: Image /qna-images/answer/27862a7a-6bc4-4f53-88af-14bdc2dc1f52.jpg

Answered: Consider a normal population…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Use technology to construct the confidence intervals for the population variance o? and the population standard deviation o. Assume the sample is taken from a normally distributed population. c= 0.99, s= 37, n 20 The confidence interval for the population variance is (Round to two decimal places as needed.) The confidence interval for the population standard deviation is (Round to two decimal places as needed.)
Which confidence interval would lead you to Fail to Reject H0? Group of answer choices Test value: 10 Confidence Interval: 13.1 – 15.1 Test value: 5 Confidence Interval: 5.6 – 6.9 Test value: 5 Confidence Interval: 4.5 – 6.3 Test value: 10 Confidence Interval: 9.2 – 9.8
The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 212 residents whose mean number of pounds of trash generated per person per week was 37.9 pounds and the standard deviation was 7.7 pounds. Round answers to 3 decimal places where possible. b. With 90% confidence the population mean number of pounds per person per week is between _______ and ________ pounds. c. If many groups of 212 randomly selected members are studied, then a different confidence interval would be produced from each group. About __________ percent of these confidence intervals will contain the true population mean number of pounds of trash generated per person per week and about ____________ percent will not contain the true population mean number of pounds of trash generated per person per week.
What is the critical value, t, for a 95% confidence interval with a sample size of 6? A. 4.032 B. 2.447 C. 2.571 D. 3.707
Construct the confidence interval for the population mean u. c= 0.90, x = 16.3, o =7.0, and n= 65 A 90% confidence interval foru is (Round to one decimal place as needed.)
Scores on an English test from 30 students in Class One has a mean of 33 and a standard deviation of 7.2. Scores on an English test from 40 students in Class Two has a mean of 39 and a standard deviation of 5.5. Assuming the two classes are independent, construct a 90%confidence interval for difference between the mean scores for Class One and Class Two. Round your answer to 3 decimal places. Base on the confidence interval, what conclusion can you draw? Group of answer choices (-8.530,-3.470) Group 2 is bigger (-8.530,-3.470) Group 1 is bigger (-8.639,-3.361) No conclusion (-8.639,-3.361) Group 2 is bigger (-6.769,-5.231) Group 2 is bigger
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A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 90.16% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σ = 15 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 7 mg/dl? A sample of at least______people
What is the critical t* needed to construct a 90% confidence interval for a population mean when n = 20? What is the critical t* needed to construct a 90% confidence interval for a population mean when n = 20? D. 1.725 A. 1.328 B. 1.325 C. 1.729
Eden obtains a mark of 67 on her final year exam. Assuming the reliability of the exam is 0.66 and the standard deviation is 10. What is the 95% confidence interval of her mark? What does the interval imply?
A car insurance company has determined that 9% of all drivers were involved in a car accident last year. Among the 10 drivers living on one particular street, 3 were involved in a car accident last year. If 10 drivers are randomly selected, what is the probability of getting 3 or more who were involved in a car accident last year? O a. O b. O C. O d. 0.4435 0.9548 0.0541 0.0452
A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 90.15% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σσ = 45 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 5 mg/dl? A sample of at least ________ people.

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