estimate the proportion of the population of Waterford workers who earn a salary of at least €65,000

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Requirements

(a) Test the normality of the data using the Shapiro-Wilk test and comment on the result. (3 marks)

(b) Estimate the proportion of the population of Waterford workers who earn a salary of at least €65,000. (4 marks)

(c) Estimate the proportion of the population of Waterford that earn between €40,000 and €50,000. (5 marks)

(d) Generate the 95% confidence interval for the sample mean of the entire sample of workers.

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