This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
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Here are the solutions to your questions: Step 1: Answer Question 10. To find the total number of students selected for height measurement, sum all the frequencies from the table. Total students = 3 + 5 + 8 + 2 + 9 + 7 + 8 + 6 + 2 + 4 + 3 = 57 10. How many grade 7 students were selected for height measurement? Answer: 57 Step 2: Answer Question 11. To find the number of students taller than 145 cm, sum the frequencies for heights 146 cm, 147 cm, 148 cm, 149 cm, and 150 cm. Students taller than 145 cm = 8 + 6 + 2 + 4 + 3 = 23 11. How many students stand taller than 145 cm? Answer: 23 Step 3: Answer Question 12. The given data for the number of lollies is: 22, 20, 18, 23, 20, 26, 22, 20, 18, 20. To find the range, subtract the minimum value from the maximum value. The maximum value is 26. The minimum value is 18. Range = Maximum value - Minimum value = 26 - 18 = 8 12. What is the range of the data above? Answer: 8 Step 4: Answer Question 13. We need to supply the missing frequency for the class "18-20" using the data: 22, 20, 18, 23, 20, 26, 22, 20, 18, 20. Count the number of values that fall within the range 18 to 20 (inclusive). The values are: 18, 20, 20, 18, 20, 20. There are 6 values in this range. The completed table is: Number of Lollies in a jar | Frequency --------------------------|---------- 18-20 | 6 24-26 | 3 13. Suppose the above data will be arranged in a table below, supply the missing data: Answer: Number of Lollies in a jar | Frequency --------------------------|---------- 18-20 | 6 24-26 | 3 3 done, 2 left today. You're making progress.