Statistical Inferences:Question 6The heights of juniors at a certain high school havea mean of 65.5 inches, with a standard deviation of3.5 inches. What is the probability that a randomlyselected junior at this school is at least 72.5 inchestall?one:This data set is unlikely to be normally distributed, sowe cannot reach a conclusion based on the giveninformation.95%OOOO

Given Mean=65.5 Standard deviations=3.5

Answered: Statistical Inferences:Question 6 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

See similar textbooks

Similar questions

ch.8 sample size question 4 SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample?
Question: A study claims that the average number of books read by college students in a year is 8. A sample of 36 students is selected, and the average number of books read by them is found to be 9 with a standard deviation of 2. Can we support the claim at a 0.01 level of significance?
Question: A company claims that the average salary of its employees is $60,000 per year. A random sample of 15 employees is selected, and the sample mean is found to be $58,000 with a standard deviation of $2,500. Using a 0.05 level of significance, can we reject the company's claim?
Question 13 The weights of grizzly bears in Jellystone National Park are normally distributed, with a mean of 63 pounds and a standard deviation of 10 pounds. You select a grizzly bear at random. Use the Empirical Rule (68-95-99.7) to find the following probabilities. Do not round any answers. a. Probability the bear weighs less than 73 pounds: b. Probability the bear weighs between 73 and 93 pounds: aline c. Probability the bear weighs more than 93 pounds: Submit Question ver n Proctor Zoom MacBook Air 吕口 F3 FI F2 F4 F7 F8 F9 F10 @ # $ & * 2 3 4 5 7 8 9 W E R T Y S F G H
Question 17 The number of calories consumed by customers at the Chinese buffet is normally distributed with mean 2886 and standard deviation 622. One randomly selected customer is observed to see how many calories X that customer consumes. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( b. Find the probability that the customer consumes fewer than 2675 calories. c. What proportion of the customers consumed more than 3060 calories? Question Help: 9 Written Example Message instructor Submit Question Jump to Answer 20 44,411
You draw a sample of size 30 from a normally distributed population with a standard deviation of four. What is the distribution of the sample mean? Question 11 options: a Poisson b Binomial c Normal
20 this question has part a,b,c, and d
Question 1 CNNBC recently reported that the mean annual cost of auto insurance is 992 dollars. Assume the standard deviation is 218 dollars, and the cost is normally distributed. You take a simple random sample of 40 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N( b. What is the distribution of ? E - N( c. What is the probability that one randomly selected auto insurance is more than $1008? d. a simple random sample of 40 auto insurance policies, find the probability that the average cost is more than $1008, e. For part d), is the assumption of normal necessary? O NoO Yes Submit Question Question 2 The sampling distribution of a statistic is (select the best answer): А: sampling was effective. B: standardizing. The mechanism that determines whether the random A normal curve, for which probabilities are obtained by C: to be randomly sampled. D: samples of the same size, from the same population. E: single random sample, from the…
Question 3 – Sampling Distribution (10 marks)The Economics Policy Institute periodically issues reports on wages of entry-level workers.The Institute reported that entry-level wages for male college graduates were $43.36 perhour, and for female college graduates were $37.60 per hour. Assume the standard deviationfor male graduates is $2.30 and for female graduates is $2.05.a. What is the probability that a sample of 50 male graduates will provide a sample meanwithin $0.50 of the population mean, $43.36? (3 marks)b. What is the probability that a sample of 50 female graduates will provide a sample meanwithin $0.50 of the population mean, $37.60? (3 marks)c. In which of the preceding two cases, part (a) or part (b), do we have a higher probabilityof obtaining a sample estimate within $0.50 of the population mean? Why? (2 marks)d. What is the probability that a sample of 120 female graduates will provide a sample meanmore than $0.30 below the population mean? (2 marks)
Answer questions #9 and #10
QUESTION 26 A sample of n = 7 scores has a mean of M = 65 and an estimated standard error of 2 points. What is the sample variance? a. s2 = 24 b. s2 = 36 c. s2 = 28 d. s2 = 14
Question 9.1 - Sampling Distribution for the Mean Please solve the problem with simple probability rules

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS