A confidence interval for a population mean has a margin of error of 2.8.a. Determine the length of the confidence interval.b. If the sample mean is 53.7, obtain the confidence interval.c. Construct a graph that illustrates your results.a. The length of the confidence interval is(Type an integer or a decimal. Do not round.)b. The confidence interval for u is from to(Type integers or decimals. Do not round.)c. Choose the correct graph below.OA.OC.ConfidenceInterval -QB.O D.ConfidenceInterval-+

Given, Margin of error, ME = 2.8Using formula,Length of confidence interval = 2×MEConfidence…

Answered: confidence interval for a population…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Click to see additional instructions The interval [40 50] represents a 90% confidence interval for a population mean. What is the most likely value for the sample mean, xbar?
Identify a question you would like to answer using statistics which may be answered using a confidence interval in plain English. Example: What is the average GPA of an incoming student at MC Identify the parameter related to your question and its symbol and its name. Example: m, mean identify the statistic related to your question and its symbol Example: x(bar), sample mean List your data(try to get at least 10 in your sample). Example: 3.28, 2.41, 3.64, 1.28,3.56, 2.57, 3.10,2.94, 2.45, 3.16, 2.45 Describe your population of inteeest. Example: All students at MC Describe your sample. Example: 11 Studens in my statistics class Comment on how you obtained your sample Example: Conducted an email survey of the students in my statistics class Comment on the bias in your sample Example; This sample is biased since it is only people in math 117, who need certain perquisites to take the course, this underrepresents students without the…
The M&M’s in your bag are a sample which will represent the population of all M&M’s. Record how many blue M&M’s are in your bag and the total number of M&M’s. Color Number Blue 15 Total 54 Suppose you wish to find a confidence interval for the proportion of M&M’s that are blue. Would your sample satisfy the assumptions? Explain. 2.Use your sample to obtain a 90% confidence interval for the proportion of M&M’s that are blue. 3. M&M’s website states that 24% of all M&M’s are blue. At the 10% significance level, do your data provide sufficient evidence to conclude that the percentage of blue M&M’s differs from 24%?
Janet wants to estimate the percentage of people who have been required to take a drug test for work. She surveys 250 individuals and finds that 175 have taken a drug test for work. Identify the values needed to calculate a confidence interval at the 98% confidence level. Then use Excel to find the confidence interval. Round the final answer to three decimal places. Provide your answer below:
Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval. n = 36, x = 64.4 seconds, s = 6.5 seconds. The margin of error is seconds. (Round to one decimal place as needed.) an example 4
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Use the confidence interval to find the estimated margin of error. Then find the sample mean. A store manager reports a confidence interval of (46.7,78.3) when estimating the mean price (in dollars) for the population of textbooks. The estimated margin of error is (Type an integer or a decimal.) The sample mean is (Type an integer or a decimal.)
ok In a survey of 2279 adults, 720 say they believe in UFOs. Construct a 95% confidence interval for the population proportion of adults who believe in UFOs. A 95% confidence interval for the population proportion is (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. R OA. With 95% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. OB. With 95% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval. OC. With 95% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of V C ◎可 F5 J % 250 T F6 دار 6 & X F7 & 7 N 8 F8 J 00 * 8 8 F9 M 09 9 K F10 O V 70°F Sunny A ☀- F11 O Alt ☀ P + F12 ^ Next 1:23 PM 11/23/2022 PrtSc CM +11 Inse
Use the confidence interval to find the estimated margin of error. Then find the sample mean. A store manager reports a confidence interval of (41.6,81.0) when estimating the mean price (in dollars) for the population of textbooks. The estimated margin of error is enter your response here. (Type an integer or a decimal.)
Quantitative Analysis Determine the confidence interval of the set of data in both columns and write your answer on the space provided. Then on the blank before each number, write: A. If the standard error in column A is greater than the standard error in column B; B. If the standard error in column B is greater than the standard error in column A; C. If the values of standard error in both columns are equal; D. If the relationships cannot be determined from the information given. Column A Column B Determine the confidence interval using 95% confidence level: 2-3. x=34 4-5. * = 36 0=2 0=5 n = 140 n = 110 Determine the confidence interval using 90% confidence level: 7-8. = 14 9-10. = 13 s = 1.45 s = 2.01 n = 15 n = 15 Find the 95% confidence interval of the proportion of x: 12-13. 14-15.x = 12 n = 39 n = 140 1. 6. 11.
Use the confidence interval to find the estimated margin of error. Then find the sample mean. ← A store manager reports a confidence interval of (46.4,81.4) when estimating the mean price (in dollars) for the population of textbooks. The estimated margin of error is (Type an integer or a decimal.) The sample mean is (Type an integer or a decimal.) a
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