The target population is the weekly income of students in 2017. The mean weekly income of STAT150 students in 2017 (population mean), µ, was $198 and the population standard deviation, o, was $34. A histogram of the weekly income of a large number of students from this population is shown, below, to illustrate the shape of the weekly income distribution. Frequency 70 60 50 40 30 20 10 0 140 160 Histogram of Weekly Income 180 200 220 Weekly Income 240 260 280 a) What shape is the distribution of student weekly income?

The target population is the weekly income of students in 2017. The mean weekly income of STAT150 students in 2017 (population mean), µ, was $198 and the population standard deviation, o, was $34. A histogram of the weekly income of a large number of students from this population is shown, below, to illustrate the shape of the weekly income distribution. Frequency 70 60 50 40 30 20 10 0 140 160 Histogram of Weekly Income 180 200 220 Weekly Income 240 260 280 a) What shape is the distribution of student weekly income?

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

The number of workers employed, the mean wage (in $.) per month and standard deviation (in $.) in each section of a factory are given below. Calculate the mean wages and standard deviation of all the workers taken together. Mean wages Section No. of workers employed (in $) Standard deviation ( in $ ) 11130 11200 11150 A 50 600 В 60 700 90 800
A team of ten (10) construction workers who are working on a project are classified according to the skill levels, Classes A to D. The table below shows the number of workers in each of the four (4) classes and their respective hourly pay-rate. Pay-rate (Rands/hour) Number of workers Class A 80 Class B 60 Class C 55 Class D 50 4. Calculate the mean hourly pay-rate for the 10 workers. A. R24.50/hour B. R57/hour C. R57.50/hour D. R61.75/hour
Measurements of zinc levels in a flowing river are normally distributed with a standard deviation of 0.5 ppm (due to measurement variation) and a mean 6.1 ppm. What value of zinc concentration from a river would place it in the top 66%?
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.
The revenue of a shop is approximately normally distributed with a mean of $4500 and a standard deviation of $800.Find the revenue, y, for which 33% of revenue are below it.
3565 6781 11366 5656 10024 9101 9286 10376 7290 15558 6657 20795 4027 19100 16223 14502 2830 5785 9070 7560 D) Calculate the mean and standard deviation of your data set. You may use technology such as Google Sheets, Excel, or a TI-83/TI-84. Round to the nearest hundredth. Mean 9777.6 Standard Deviation 5090.73 E) Using a significance level a = 0.05, find the critical value using the following steps. 1. What are the degrees of freedom? n D20 d. f.= n- 1=19 = 19 2. Will this be a one-tailed or two tailed test? two-tailed 3. Using table 5 from the back of your textbook (page A18 in Appendix B), what is the critical value? 1.729
According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a standard deviation of $7000. Assuming that the salaries of assistant professors follow a normal distribution, find the proportion of assistant professors who earn at most $53,000. Round your answer to at least four decimal places.
Approximately 10% of people in the U.S. earn an income of $200,000 per year or higher. If income were normally distributed, and the mean income is $40,000 per year, what is the standard deviation of income in the U.S.? (Note. these figures are not accurate.)