Question 5: A random sample of 50 employees is chosen for a company… A random sample of 50 employees is chosen from a company.The average salary of the 50 employees is $55,000 and thestandard deviation is $5,000. Find a 95% confidence intervalfor the average salary of the entire company. (Type numbers inExcel without dollar sign)($53,614.09, $56,385.90)O ($53,579.02, $56,420.98)O ($53,579.01, $56,420.98)O ($53,614.1O, $56,385.90)

Answered: Image /qna-images/answer/d9412e2b-d910-489a-b907-9da20c3b2169.jpg

Answered: A random sample of 50 employees is…

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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Question # 5: Twenty-five army inductees in Ontario were given a blood test to determine their blood type. The data set is A B B AB O O O B AB B B B O A O A O O O AB AB A O B A Calculate the single-number estimate of the population proportion of the army inductees who got blood type O.
How does an observed sample mean qualify as a rare outcome?
Question 1
ch 11 end. 5 : The XYZ Corporation is interested in possible differences in days worked by salaried employees in three departments in the financial area. A survey of 23 randomly chosen employees reveals the data shown below. Because of the casual sampling methodology in this survey, the sample sizes are unequal. Research question: Are the mean annual attendance rates the same for employees in these three departments?
Question: Recent surveys have shown a decline in the percentage of U.S. households with cable TV. In one city, a simple random sample of 468 households had 117 households reporting they had cable TV, and 351 households reporting they did not. (a) Show the “plug-in” box to represent our best guess for the relative frequency of people with and without cable. (Let 1 correspond to with cable and 0 without). (b) The percentage of households in the city with cable TV is estimated to be ___________%, and this estimate is likely to be off by about ___________% or so.(c) A 90%-confidence interval for the percentage of households in the city with cable TV goes from ___________% to ___________%.
Question 2(b) b) Employers want to know which days of the week employees tend to take as a casual day in a five-day workweek. The majority of employers would like to believe that the employees would equally choose either of the days during the week. A random sample of 80 managers was asked on which day of the week, their employees were like to take. The data are given below. Day of the Week taken for Casual Day Tuesday Wednesday Thursday Monday Friday Number of employees who take day off 15 12 20 19 For the population of employees, do the days for the highest frequency occur with equal frequencies (i.e. distributed uniformly) during a five-day workweek? Test at a 10% level of significance.

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A random sample of 50 employees is chosen from a company. The average salary of the 50 employees is $55,000 and the standard deviation is $5,000. Find a 95% confidence interval for the average salary of the entire company. (Type numhers in