STAT1104B - Cumulative Frequency Curve and ‘probability Sampling’ & ‘non-Probability’ Sampling - Statistics Assignment Help

Assignment Task -

(A) (i) Estimate the mean and the variance of this distribution.

(ii) Plot a cumulative frequency curve, using graph paper, to represent the data and obtain the median.

(iii) Using the mean and median, determine the shape of the distribution. 

(iv) State, with a reason, whether you should use the mean or the median to represent the data in this distribution.

(v) Determine the lower quartile and upper quartile from the cumulative frequency curve.

(B) (i) Distinguish between ‘probability sampling’ and ‘non-probability’ sampling.

(ii) State a circumstance when you would consider using stratification when sampling from a population.

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