QUESTION 1
In a small survey, a restaurant owner in Pretoria CBD sampled 29 customers and recorded the
prices of their meals in order to assess sold meals by price. The price of meals (in rands) were:
288, 253, 365, 280, 172, 390, 158, 244, 347, 248, 335, 165, 156, 236, 269, 348, 288, 262, 251,
255, 350, 288, 253, 259, 263, 174, 192, 244, 301.
Enter the above data in cell A of your spreadsheet and use the Microsoft Excel formulae to answer
the questions which follow unless advised otherwise.
(a) Identify the random variable and the data type used in his survey.
(4)
(b) Compute the descriptive statistics and the 99% confidence interval of the true mean price of
a meal using the Microsoft Excel analysis tool pack and paste the output for your answer.
(4)
(c) Compute the variance, coefficient of variation, lower quartile, and upper quartile of the
above data.
(12)
(d) What does the kurtosis of a dataset tell about the distribution?
(e) What does the skewness of a dataset tell about the distribution?
ཙིཙེ
(4)
(4)
[28]
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