The general manager of a chain of furniture stores believes that experience is the most important factor indetermining the level of success of a salesperson. To examine this belief she records last month's sales (in$1,000s) and the years of experience of 10 randomly selected salespeople. These data are listed below.SalespersoYears ofSalesЕxperience179.31020431558186.5147122087179.2030101525Scatter plot of Sales ($1000) vs Yea rs of ex perience30-252010.1020Years at expenence What does the scatter diagram above tell you about the relationship between years of experienceand sales ($1000)?b).Determine the least squares regression line.c).Interpret the value of the slope of the regression line.d).Construct the 95% confidence interval for the slope of the population regressionequation. Does it suggest there is a linear relationship between years of experience and sales?e).about the two variables.Determine the coefficient of determination and discuss what its value tells youDiscussf).Calculate the coefficient of correlation.r =What sign does it have? Why?g).Conduct a test of the population coefficient of correlation to determine at the 5%significance level whether a linear relationship exists between years of experience and sales.

Scatter plot is used to represent the relation between two variables graphically. If the dots…

Answered: The general manager of a chain of…

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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A recent report stated that in 1990, there were approximately 9.7 million employment opportunities in a Science, Technology, Engineering or Mathematics (STEM) related field. There is a reported 17.3 million positions available in a STEM related field in 2019. What is the relative change in the number of STEM positions available from 1990 to 2019? A. 7.6% B. 56.1% C. 43.9% D. 78.4%
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A psychologist believed that as children get older, they engage in more “inactive activities” such as playing computer games, watching TV and surfing the internet. She collected data from 10 children. She recorded the age of each child and the amount of activity (in hours) the child engaged in per week. Age Activity 7 4.3 9 3.2 10 1 13 1.5 12 1.2 15 0.8 9 3 12 4 15 1.5 14 1.9 Using excel, obtain a scatterplot of the data. Discuss the relationship between age and activity based on the scatterplot. Using excel, obtain the simple linear regression linear regression line predicting activity from age. Interpret the intercept and slope of the regression line. By hand, predict the amount of activity for age = 14. By hand, calculate the residual for age = 14 Using excel output, test the null hypothesis that the slope coefficient is zero using the p-value approach. Write one sentence interpreting the meaning of this result. Make sure to report the test statistic…
Determine whether the data set is a population or a sample. Explain your reasoning. The diastolic blood pressure of 10 patients in a hospital containing 200 patients Choose the correct answer below. O A. Population, because it is a collection of blood pressure for all patients in the hospital. O B. Sample, because it is a collection of blood pressure for all patients in the hospital, but there are other hospitals. O C. Sample, because the collection of 10 patients' blood pressures is a subset of all patients in the hospital. O D. Population, because it is a subset of all patients in the hospital. Type here to search

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