Answer to Question #139572 in Statistics and Probability for Lin

Question

(a) A random sample of 300 students from a geographic area indicated that 45 students attended private school. Estimate the true proportion of students attending private schools with 95% confidence.

(b) A survey of 25 individuals who passed the ACCA exam showed that average annual
salary is RM150,000 and standard deviation RM15,000.
(i) Find the degrees of freedom.
(ii) Construct 99% confidence interval for the true average salary.

Answer 1

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