Chapter 08, Section 8.3, Problem 044The mean time taken to design a house plan by 39 architects was found to be 17 hours with a standard deviation of 3.55 hours.a. Construct a 98% confidence interval for the population mean u.Round your answers to two decimal places.tohours A sample of 1100 observations taken from a population produced a sample proportion of 0.30. Make a 90% confidence interval for p.Round your answers to three decimal places.toThe true population proportion for this population is 0.34. Does the confidence interval constructed cover this population proportion?The confidence interval| the true population proportion.

It is given that the sample size is 39 architects, the mean time is 17 hours and standard deviation…

Answered: Chapter 08, Section 8.3, Problem 044…

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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9.13 Given a sample size of 36, how large does the population standard deviation have to be in order for the standard error to be A. 1? B. 2? C. 5? D. 100?
Question 3 You measure 24 textbooks' weights, and find they have a mean weight of 35 ounces. Assume the population standard deviation is 9 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. Give your answers as decimals, to two places Calculator > <μ<
Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places. tep 3 of 3: Draw a conclusion and interpret the decision.
Chapter 08, Section 8.3, Problem 044 The mean time taken to design a house plan by 38 architects was found to be 20 hours with a standard deviation of 3.70 hours. X Incorrect. a. Construct a 95% confidence interval for the population mean u. Round your answers to two decimal places. to hours
Chapter 8. 5) A random sample of 43 Foreign Language movies made since 2000 had a mean length of 112.5 minutes, with a standard deviation of 12.6 minutes. (a) Construct a 95% confidence interval for the true mean length of all Foreign Language movies made since 2000 (b) As of November 2010, three Spider-Man movies have been released, and their mean length is 129 minutes. Someone claims that the mean length of Spider-Man movies is actually less than the mean length of all Foreign Language movies. Does the confidence interval contradict this claim? 6
Ch. 6.1 CI We examine the effect of different inputs on determining the sample size needed to obtain a specific margin of error when finding a confidence interval for a proportion. Find the sample size needed to give, with 95% confidence, a margin of error with +/- 6% when estimating a proportion. Within +/- 4%. Within +/- 1%. (Assume no prior knowledge about the population proportion p). Comment on the relationship between the sample size and the desired margin of error.
chapter 7.1
Part b. Please show TI 84 steps
Questions 3) Unsure of how many people drive by your house each day, and with plenty of time at home now, you decide to find out. Not wanting to spend everyday sitting in your front yard you decide to randomly select 10 days. In your sample you find an average of 153 cars drive by per day. The sample also shows a standard deviation of 20 cars. What is the best guess for the mean cars per day? Give a 90% Confidence Interval. Let’s say you know for certain the population standard deviation is 20 cars. What is your best guess now? What is the 90% confidence interval now? Are your answers from part c) different than a) and b)? If so, Why?
Step 1.1 Instructions: please make sure to respond well explained these a,b,c questions.
Question 7n A business analyst wants to estimate the average monthly expenditure on bread by a family in Montreal. She wants to be 95% confident of her results, and she wants the estimate to be within $1.00 of the actual figure. Choices below are given as [lower limit, upper limit]. The historical standard deviation of monthly bread purchases is $4.00. What is the required sample size to achieve her estimation accuracy? a) 62 b) 63 c) 44 d) 61

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