Answer is in the attachment below.
The square roots of 1.44 are 1.2 and -1.2. We calculated this by taking the square root of 1.44, which is 1.2, and considering both the positive and negative values. This gives us the complete solution of ±1.2.
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Jawab:Penjelasan dengan langkah-langkah:To create a weighted frequency distribution from the given exam scores, first, count the occurrences of each unique score (frequency). Then, multiply each frequency by its corresponding score to get the weighted score. Finally, sum the weighted scores and divide by the total number of scores to find the weighted average. Here's how to do it with the provided data: 27 79 69 40 51 88 27 70 81 31 53 44 93 51 65 88 65 70 85 30 70 44 61 55 65 80 65 93 85 45 57 44 73 55 65 81 65 65 91 33 27 48 62 55 65 73 45 48 90 32 65 65 70 80 88 87 83 83 65 65. 1. Identify unique scores:27, 30, 31, 32, 33, 40, 44, 45, 48, 51, 53, 55, 57, 61, 62, 65, 69, 70, 73, 79, 80, 81, 83, 85, 87, 88, 90, 91, 93.2. Count frequencies:27: 330: 231: 132: 233: 140: 144: 345: 248: 251: 253: 155: 357: 161: 162: 165: 1069: 170: 573: 279: 180: 281: 283: 285: 287: 188: 390: 191: 193: 23. Calculate weighted scores:Multiply each frequency by its corresponding score. For example, for score 27, the weighted score is 27 * 3 = 81.4. Sum the weighted scores:Add all the weighted scores from step 3.5. Calculate the weighted average:Divide the sum of weighted scores (from step 4) by the total number of students (which is 60).This process will result in a table or a calculation showing the weighted frequency distribution of the exam scores. The weighted average will give you a single representative value for the overall performance in the class.