This question tests ISEE Lower Level Mathematics Achievement skills: finding the mode of a data set. The mode is the number that appears most frequently in a set of values. It helps identify the most common occurrence in a data set. In this specific data set, the value 55 appears 3 times, which is more frequent than any other number. Choice C is correct because it accurately identifies 55 as the mode, demonstrating understanding of frequency. Choice A is incorrect because it represents the maximum value, which is a common mistake when students do not focus on frequency. To help students: Practice identifying the mode by counting occurrences of each number in a data set. Encourage checking each value's frequency and comparing to find the most common one. Watch for confusion between mode, mean, and median.

This question tests ISEE Lower Level Mathematics Achievement skills: finding the mode of a data set. The mode is the number that appears most frequently in a set of values. It helps identify the most common occurrence in a data set. In this specific data set, the value 20 appears 4 times, which is more frequent than any other number. Choice B is correct because it accurately identifies 20 as the mode, demonstrating understanding of frequency. Choice A is incorrect because it represents the maximum value, which is a common mistake when students do not focus on frequency. To help students: Practice identifying the mode by counting occurrences of each number in a data set. Encourage checking each value's frequency and comparing to find the most common one. Watch for confusion between mode, mean, and median.

The initial data set for the first five games is {2, 3, 3, 4, 4}. In this set, both 3 and 4 are modes because they each appear twice. For 4 to become the only mode in the set of six games, the number of goals scored in the sixth game must be 4. This would make the new set {2, 3, 3, 4, 4, 4}, where 4 appears three times and is the only mode.

The original list of temperatures is {72, 72, 75, 78}. The mode is 72 because it appears twice. For the new list of five temperatures to have two modes, the added temperature must create a second value that also appears twice. Adding 75 to the list results in {72, 72, 75, 75, 78}, which has two modes: 72 and 75.

The mode is the value that appears most frequently in a data set. In the set {15, 16, 17, 18, 19}, each number appears only once. Since no number appears more often than any other, this set has no mode.

First, combine the scores from both teams into a single data set. The combined set is {25, 30, 25, 35, 25, 35}. Next, count the frequency of each number. The number 25 appears three times, 30 appears once, and 35 appears twice. Since 25 appears most often, it is the mode.

The most popular pet is the one that sold the most, which corresponds to the mode of the sales data. The number of each animal sold was: hamsters (5), goldfish (8), kittens (5), parakeets (6). The highest number of sales was 8, for goldfish. Therefore, goldfish was the most popular pet.

This question tests ISEE Lower Level Mathematics Achievement skills: finding the mode of a data set. The mode is the number that appears most frequently in a set of values. It helps identify the most common occurrence in a data set. In this specific data set, the value 9 appears 4 times, which is more frequent than any other number. Choice C is correct because it accurately identifies 9 as the mode, demonstrating understanding of frequency. Choice A is incorrect because it represents the maximum value, which is a common mistake when students do not focus on frequency. To help students: Practice identifying the mode by counting occurrences of each number in a data set. Encourage checking each value's frequency and comparing to find the most common one. Watch for confusion between mode, mean, and median.

This question tests ISEE Lower Level Mathematics Achievement skills: finding the mode of a data set. The mode is the number that appears most frequently in a set of values. It helps identify the most common occurrence in a data set. In this specific data set, the value 1 appears 4 times, which is more frequent than any other number. Choice C is correct because it accurately identifies 1 as the mode, demonstrating understanding of frequency. Choice A is incorrect because it represents the maximum value, which is a common mistake when students do not focus on frequency. To help students: Practice identifying the mode by counting occurrences of each number in a data set. Encourage checking each value's frequency and comparing to find the most common one. Watch for confusion between mode, mean, and median.

This question tests ISEE Lower Level Mathematics Achievement skills: finding the mode of a data set. The mode is the number that appears most frequently in a set of values. It helps identify the most common occurrence in a data set. In this specific data set, the value 2 appears 4 times, which is more frequent than any other number. Choice B is correct because it accurately identifies 2 as the mode, demonstrating understanding of frequency. Choice A is incorrect because it represents the maximum value, which is a common mistake when students do not focus on frequency. To help students: Practice identifying the mode by counting occurrences of each number in a data set. Encourage checking each value's frequency and comparing to find the most common one. Watch for confusion between mode, mean, and median.