18. Calculate the variance and standard deviation for the monthly income of 50 employeesin a firm. Explain the meaning of the value of standard deviation obtained.Number of emploveesMonthly income (RM)500<700700<900900<11009.151100<13001300 15001S

Introduction: For a grouped sample data with k classes with class marks denoted by m, class…

Answered: 18. Calculate the variance and standard…

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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Linda is in her first semester at a university and is taking a calculus course with a large enrollment. She just took the first midterm exam and is nervous about her score, which was 68. Among all the students in the course, the mean of the exam was 79 with a standard deviation of 15. Find the =-score of Linda's exam score relative to the exam scores among all the students in the course. Round your answer to two decimal places.
8. mean = 23.8; standard deviation = 5,2
A set of 1100 exam scores is normally distributed with a mean = 78 and standard deviation = 4.How many students scored higher than 78? How many students scored between 74 and 82? How many students scored between 70 and 86? How many students scored between 78 and 82? How many students scored lower than 74? How many students scored lower than 82?
P(y>250) mean is 250 and standard deviation is 50
1 explain the central limit theorem. 2 explain standard error of mean. how is it related to standard deviation.
The table below shows some data fromn a known international clothing company. Each row in the table shows sales for a year (in million) and the amount spent on advertising that year (in million). In this case, sales is what we want to predict using the advertising budget. Find the following. Given that: Mean of Advertising =15 and standard deviation = 5 Mean of Sales= 45 and standard deviation = 10 Advertising (Million) Sales (Million) 19 54 10 28 12 43 17 47 8 32 15 50 22 65 1. Find the correlation coefficient (r). Determine the direction and strength of the relationship? 2. Find the Coefficient of determination. Explain the result (is it a useful model)? 3. Compute and draw Regression line model. 4. Compute the mean absolute error for this regression model.
A normal shaped distribution with mean of 40 and standard deviation of 8 is transformed into z-score. Describe the shape, the mean, and the standard deviation for the resulting distribution of z-score.
how to understand standard deviations
10. mean = 54.2; standard deviation = 12,3
Ore
can you find the mean and standard deviation?
A sample of people have their income measured in dollars per year. Robin gets a deviation of +5 on this variable. How does she compare to the sample? Her annual income is 5 standard deviations higher than the mean Her annual income is 5 dollars higher than the mean Her annual income is 5 points higher than the mean The mean of the sample is 5 thousands dollars higher than Robin’s income

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18. Calculate the variance and standard deviation for the monthly income of 50 employees in a firm. Explain the meaning of the value of standard deviation obtained. Number of emplovees Monthly income (RM) 500<700 700<900 4. 900<1100 15 1100<1300 1300<1500 1S