Use technology to construct the confidence intervals for the population variance of and the population standard deviation o. Assume the sample is taken from a normally distributed population.c=0.95, s=37, n= 18The confidence interval for the population variance is (770 86, 3076.74).(Round to two decimal places as needed.)....The confidence interval for the population standard deviation is(Round to two decimal places as needed.)MoreHelp me solve thisView an exampleGet more help-Clear all55°F AOType here to search99+LenovoAL BTY10/05/17InsertDeletePrtScF11F12F9F10CF5F7F8F6F4F3EscF1F2Bac@2376-345团%24

Answered: Use technology to construct the…

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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Find a 90% confidence interval for the population mean age of the Smurfs if a sample of 52 smurfs have a mean age of 49.7 years. The standard deviation is know to be 3.4. The Margin of Error (3 decimals) is E = . The answer is We are 90% confident the true mean age of Smurfs is between and years.
Also find the standard deviation of the battery lives. Write your answers in decimal form. Its urgent.
Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard deviation 20.3. Find the first quartile Q1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is enter your response here. (Type an integer or decimal rounded to one decimal place as needed.)
suppose babies botn after a gestiation pwriod of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 800 grams while babies born after gestation period of 40 weeks have a mean weight of 2900 grams and.a standard deviation of 385 grams. if.a 35 week gestation period baby weeks 220 grams and a 41 week gestatio0n period baby weigh 2400 grams find the corresponding z scores . which baby weighs less relative to the gestation period?
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On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 100 and a standard deviation of 16. Suppose one individual is randomly chosen. Let X = IQ of an individual. d. Find the Inter Quartile Range (IQR) for IQ scores. Round your answers to 2 decimal places.Q1: Q3: IQR:
Assume that adults have IQ scores that normally distributed with a mean of 99.2 and a standard deviation of 24.2. Find the first quartile Q1. Which is the IQ score separating the bottom 25% from the top 75%. ( hint . Draw a graph ). The first quartile is ____ ( type an integer or decimal rounded to one decimal place as needed .)
On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of 112 and a standard deviation of 17. Suppose one individual is randomly chosen. Let X = IQ of an individual. d. Find the Inter Quartile Range (IQR) for IQ scores. Round your answers to 2 decimal places.Q1: Q3: IQR:
Find the 80% confidence intervals for the variance and standard deviation of the ages of seniors at Oak Park College if a random sample of 28 students have a standard deviation of 2 years. Assume the variable is normally distributed. Use the chi-square distribution table to find any chi-square values to three decimal places. Round the final answers to one decimal place.
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1529 and the standard deviation was 320. The test scores of four students selected at random are 1970, 1280, 2220, and 1410. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1970 is. (Round to two decimal places as needed.) The z-score for 1280 is (Round to two decimal places as needed.) The z-score for 2220 is (Round to two decimal places as needed.) The z-score for 1410 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The unusual value(s) is/are (Use a comma to separate answers as needed.) B. None of the values are unusual.
Cell Phone Lifetimes A recent study of the lifetimes of cell phones found the average is 23.2 months. The standard deviation is 3.1 months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be less than 23.8 months. Assume cell phone life is a normally distributed variable, the sample is taken from a large population, and the correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator. Round your answer to at least four decimal places. P(X<23.8)=
Construct a 95% confidence interval for the population mean, µ. Assume the population has a normal distribution. A random sample of 16 lithium batteries has a mean life of 645 hours with a standard deviation of 31 hours. Round each number to the thousandths place. Lower = Upper =

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