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Assignment Task

QUESTION 

(i) Produce an appropriate histogram and Ogive of the business profit variable.

(ii) Produce a Box plot for this variable (Profit).

QUESTION 2

Calculate a 95% confidence interval for the unknown population mean of the variable Age.

QUESTION 3 

Test, at the 1% level of significance, whether the average business has more than 15 employees.

QUESTION 4 

Can we conclude at 5% level of significant that the presentation (appearance or proportion) of business location 1 = Parramatta CBD is more than 40%.

QUESTION 5 

(i) Estimate the regression equation to predict the Profit (y) from the number of employee (x).

(ii) What are the Residuals (errors) of this regression equation and what is the sum of these residuals using Excel calculations only.

(iii) Does the data provide evidence that the slope of the equation from part (i) is positive? Perform an appropriate hypothesis test using a 5% level of significance.

(iv) Present the correlation coefficient of the Profit and number of employee and the significant of this correlation.

NOTE: The data was randomly created for the sole purpose of this assignment. The data can be assumed to be normally distributed for all continuous variables

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• Uploaded By : Roman

• Posted on : January 03rd, 2020

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