Activity 3. Do It YourselfSolve the following problems:1. The average rating of a public senior high school students in a certaindivision of region X is 85% with a standard deviation of 3.a. If a sudent is selected, what is the probability that his average ratingis greater than 80 %?Step 1. Identify the given informationStep 2. Identify what is askStep 3. Identify the formula to be used.Formula to be used to standardize 80 would beStep 4. Solve the problemSolution:Illustration:Step 5. State the final answer.a. If a random sample of 20 senior high school students is selected, what isthe probability that the average rating is less than 80 %?Step 1. Identify the given informationStep 2. Identify what is askStep 3. Identify the formula to be used.When dealing with an individual data obtained from the population, theformula to be used to standardize 80 would beStep 4. Solve the problemSolution:Illustration:Step 5. State the final answer.

Given that ..If random sample size is 20 then we have to find the probability that average rating…

Answered: Activity 3. Do It Yourself Solve 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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Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
Step 1: Although cities encourage carpooling to reduce traffic congestion, most vehicles carry only one person. For example, 70% of vehicles on the roads in the Minneapolis-St. Paul metropolitan area are occupied by just the driver. You choose 84 vehicles at random. What are the mean and standard deviation of the proportion of vehicles in your sample that carry only one person? (Fill in the blanks below.) The mean is (1) . (Give your answer to 1 decimal place.) (2) The standard deviation is (Give your answer to 2 decimal places.) eBook Answer 1 Answer 2
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Read the following prompt and complete 3.a and 3.b
Please show the steps to solve the problems 28 a, b, and c.
Now suppose that the true mean exposure time is different from 8h/day, yet the sample mean falls in the acceptance region. In this case we would fail to reject H0 when it is false. This type of wrong conclusion is called a A. type II error B. type I error C. no error D. statistically significant
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3.The average GPA scored by a class is 4.76, and the standard deviation is 0.64. For a sample of 16 students, find the z-score that the average is above 5.0. A.0.375 B.1.5 C.0.75 D.6
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7. The manager of a small dry cleaner employs six people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they travel one way from home to work. The six distances are listed below. Find the sample VARIANCE and STANDARD DEVIATION for the given data. Round your final answer to one more decimal place than that used for the observations. Use BOTH the DEFINING Formula and the COMPUTING Formula to find the standard deviation and compare your answers for the 2 methods. Se Stept 12.7 24.5 40.4 30.8 22.5 15.6 n-1 Sx - 514.8412 m Úse Table for Defining Formula
How many times per year should you order? Use the following information to find out. Lead time: 6 weeks, ordering cost: 100, annual demand: 1196, weekly demand: 23, annual cost to carry one item, stated as a percentage of item cost: 25%, cost per item: 6, safety factor: 1.3, standard deviation of demand during lead time: 50, standard deviation of demand during P + L: 134

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