The number of employees of a random sample of companies from City A are listed following grouped frequency distribution table: Number of employees Number of companies 25-33 12 34 -42 18 43-51 13 52-60 16 61 -69 8 (i) Find the sample mean of the grouped frequency distribution. (3 ma (ii) Find the sample standard deviation of the grouped frequency distribution. (4 ma (iii) Find the standard score for a company that has 34 employees and interpret its mean Correct your answer to 2 decimal places. (3 mark b) The table below lists the heights (in cm) of 20 children aged 7 in ascending order. 125 126 128 128 130 130 132 132 133 134 135 135 136 136 136 138 138 139 139 152 Determine if there is/are any potential outliers in the data set. Explain. (4 mark