6. The data about the sales and advertisement expenditure of a firm is given below:SalesAdvertisement expenditure(in crores of(in crores of .)406MeansStandard deviations101.5Coefficient of correlation =r = 0.9(1) Estimate the likely sales for a proposed advertisement expenditure of(i) What should be the advertisement expenditure if the firm proposes a sales target of 60 crores10 crores.

Answered: Image /qna-images/answer/1c3674f0-a3cb-4477-afd8-6edb528f648c.jpg

Answered: 6. The data about the sales and…

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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(b) The following chart shows the relationship between concert seating capacity (00) and revenue in RM '000 for a sample of concerts. i) ii) iii) Am oun t (RM '000 ) Exercises ke What is the above diagram called? How many concerts were studied? Describe on the relationship between revenue and seating capacity.
How to find the relative and percent error in this data?
1. The following table gives the estimated stature (length, in cm) of human fetuses at various times (in weeks) since conception. Age_(x) a. b. 18 20 22 24 26 28 30 32 34 36 38 40 Stature_(y) 19.72 23.41 27.80 30.86 33.17 36.27 39.37 41.48 43.51 45.62 48.50 49.81 Find the coefficient of correlation. How closely do the data seem to fit a straight line? Find the equation of the least squares line. C. Plot the data and least squares line on the same graph. Does the line accurately fit the data? d. If this formula continues to be accurate, what would we expect for the stature of a 45-week- old fetus?
What would be the appropriate inferential statistic to evaluate the relationship between: • 'Generation' [Baby Boom (1946-1964), Generation X (1965-1980), Millennials (1981-1996)] • 'Household Income' (in US $) median and interquartile range means comparison (t or ANOVA) correlation coefficient (r) chi-square (x2) mean and standard deviation frequency and percentage
11. Why doesn't correlation equal causation?
The accompanying table shows the years of experience of 10 salesmen and their annualsales (in ’000 dollar) respectivelyi) Find the correlation coefficient between sales and experience from the above data.ii) Construct a scatter plot.iii) What does the plot suggest about the nature of the relationship between the two variables? Also comment on your result.
If a set of observations is normally distributed, what percent of these differ from the mean by (a) more than 2.50? (b) less than 0.640?
Dataset for question (4.2.) Amount of Money Spent on Vehicle extras by 7 customers: Customer Amount_Spent х1 2300 x2 2386 x3 1920 х4 1578 x5 3065 х6 2312 x7 1790 4.2. A car dealer wants to know if the purchasing habits of buyers buying extras for their vehicles have changed. He is particularly interested in determining if male buyers are willing to spend more money on extras for their cars. Based on data collected over the past year, he has estimated that the distribution of the amount of money spent on extras is approximately normally distributed with an average of R2 000 per customer. To test this hypothesis, he has collected the following information concerning the amount of money that the last seven male customers have spent on extras (Rands). Provide all the steps.
Suppose that you wish to estimate the difference between mean pH measurements of rainfalls in two different locations, one in relatively unpolluted area and the other in an area subject to heavy air pollution. You want to be 95% confident that the margin of error for the difference between mean pH of rainfalls in relatively unpolluted area and mean pH of rainfalls in an area subject to heavy air pollution will not exceed 0.1 pH. How many rainfalls (pH measurements) must be included in each sample? Assume that the variance of pH measurements in a relatively unpolluted area is equal to 2 = 20, and the variance of pH measurements in an area subject to heavy pollution is equal to 2 = 0.25, and samples will be of equal size (n = n₂ = n). 2 It is supposed that values of pH in rainfalls are normally distributed in polluted and unpolluted areas. The number of rainfalls (pH measurements) that must be included in each sample is
Find the coefficient of correlation between the sales and expenses of the following 10 firms: Firms Sales ('000) : 1 2 3 55 4 6. 65 5 7 9 10 60 50 8 : 50 50 60 65 65 60 Еxpenses ('000) :11 13 14 16 16 15 15 14 13 13

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