You intend to estimate a population mean with a confidence interval. You believe the population to have anormal distribution. Your sample size is 8.Find the critical value that corresponds to a confidence level of 80%.(Report answer accurate to three decimal places.)t₁/2 = ±Submit Question

The sample size (n) = 8 We need to find the critical value at confidence level 80%

Answered: You intend to estimate 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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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately = 60.5. You would like to be 95% confident that your estimate is within 5 of the true population mean. How large of a sample size is required? Round up to nearest whole number. n= Question Help: Video Written Example Message instructor Submit Question Jump to Answer 80 F1 F2 F3 Q A N @ 2 W S #3 X E D $ F4 R or dº % 5 F5 T MacBook Air F6 6 Y & 7 A4 F7 U * 00 8 J DII F8 | ( 9 K F9 0 ) о
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 62.1. You would like to be 98% confident that your esimate is within 7 of the true population mean. How large of a sample size is required? n = Use a critical value accurate to three decimal places, and do not round mid-calculation. Question Help: Video Message instructor Submit Question
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Cereals sodium values have a mean of 167 and a standard deviation of 77.3. Find the z-score for the cereal that has a sodium value of 0. How would you interpret this z-score?
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Most people think that the "normal" adult body temperature is 98.6degrees°F. In a more recent study, researchers reported that a more accurate figure may be 98.198.1degrees°F. Furthermore, the standard deviation appeared to be around 0.60.6degrees°F. Assume that a Normal model is appropriate. Complete parts a through c below. Question content area bottom Part 1 a) In what interval would you expect most people's body temperatures to be? Explain. Select the correct choice below and fill in the answer box(es) to complete your choice. A. Using the 68-95-99.7 Rule, about 95% of the body temperatures are expected to be less than enter your response heredegrees°F. (Round to one decimal place as needed.) B. Using the 68-95-99.7 Rule, about 95% of the body temperatures are expected to be between enter your response heredegrees°F and enter your response heredegrees°F. (Use ascending order. Round to one decimal place as needed.) C. Using the…
You measure 46 turtles' weights, and find they have a mean weight of 36 ounces. Assume the population standard deviation is 3.4 ounces. Based on this, construct a 80% confidence interval for the true population mean turtle weight.Give your answers as decimals, to two places ¯x ± M.O.E._________ ± ________ounces
Hospital Noise Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 169 ward areas was 60.3 decibels, and the population standard deviation is 6.1 . Find the 96% confidence interval of the true mean. Use a graphing calculator and round the answers to one decimal place.

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You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 8. Find the critical value that corresponds to a confidence level of 80%. (Report answer accurate to three decimal places.) t₁/2 = ± Submit Question