Q4:It is said that a fully charged cell phone battery can last about 9 hours on average with a standarddeviation of about 6 hours. Calculate the probability that the sample mean is within +1 of thepopulation mean (+1) for each of the following sample size.The sample size of 36.b.The sample size of 81.c. What is the advantage of a larger sample size?a.

For the distribution of the lifetime (in hours) of a fully charged cellphone battery, it is given…

Answered: Q4: It is said that a fully charged…

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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A sample mean for a treated group of n = 9 individuals is 32 and the population mean for the untreated group is 26. If the sample standard deviation is 9 ( is unknown), which of the following test statistics is correct? O z = .67 O z = 2.0 Ot=.67 O t = 2.0
Suppose that the efficacy of a certain drug is 0.64. Consider the sampling distribution (sample size 155) for the proportion of patients cured by this drug. n3D a. What is the mean of this distribution? b. What is the standard error of this distribution? Round the answer to three decimal places.
The lengths of adult males' hands are normally distributed with mean 189 mm and standard deviation is 7.3 mm. Suppose that 46 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of x? ¤ - N( b. For the group of 46, find the probability that the average hand length is more than 188. c. Find the third quartile for the average adult male hand length for this sample size. d. For part b), is the assumption that the distribution is normal necessary? O YesO No Hint: Some Helpful Videos: Finding the Sampling Distribution [+] Finding a Probability Using the Central Limit Theorem [+] Finding Value Given a Probability Using the Central Limit Theorem [+] • The Central Limit Theorem For Sums 2 [+]
Let x be a random variable that represents the commute time of teachers in a large urban area. If x is normally distributed with a mean of 49 minutes and a standard deviation of 5.2 minutes, find the commute time which is at the top of the bottom 10%. A. 55.66 minutes B. 42.34 minutes C. 42.63 minutes D. 41.38 minutes
Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 7.1-in and a standard deviation of 1.2-in.In what range would you expect to find the middle 50% of most head breadths?Between_______ and_________ .If you were to draw samples of size 48 from this population, in what range would you expect to find the middle 50% of most averages for the breadths of male heads in the sample?Between_______ and________ .Enter your answers as numbers. Your answers should be accurate to 2 decimal places.
This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
The lengths of adult males' hands are normally distributed with mean 191 mm and standard deviation is 7.4 mm. Suppose that 8 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of x? ¤ - N( b. For the group of 8, find the probability that the average hand length is less than 189. c. Find the first quartile for the average adult male hand length for this sample size. d. For part b), is the assumption that the distribution is normal necessary? O NoO Yes
1. A population has a standard deviation of 24. Find the standard error for the following sample sizes: a. N=4 b. N=9 c. N = 16 CLO F2 0 F3 Q F4 112 ů F5 FEB 27 N MacBook Air F6 F7 D
Need A B C

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