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Consider a data set with at least three data values. Suppose the highest value is increased by 10 and the lowest is decreased by 10.(a) Does the mean change? Explain.No, the sum of the data does not change.Yes, the sum of the data changes.    Yes, the number of data values changes.Yes, changing the extreme data values affects the mean.No, the number of data values does not change.(b) Does the median change? Explain.Yes, the sum of the data changes.No, the sum of the data does not change.    No, the number of data values does not change.No, changing the extreme data values does not affect the median.Yes, the number of data values changes.(c) Is it possible for the mode to change? Explain.Yes, depending on the range of the data values.No, the only change is an increased frequency of 1 for the extreme values.    No, all values will still occur at the same frequency.Yes, depending on which data value occurs most frequently after the data are changed.Yes, depending on the number a data values.

Question

Consider a data set with at least three data values. Suppose the highest value is increased by 10 and the lowest is decreased by 10.(a) Does the mean change? Explain.No, the sum of the data does not change.Yes, the sum of the data changes.    Yes, the number of data values changes.Yes, changing the extreme data values affects the mean.No, the number of data values does not change.(b) Does the median change? Explain.Yes, the sum of the data changes.No, the sum of the data does not change.    No, the number of data values does not change.No, changing the extreme data values does not affect the median.Yes, the number of data values changes.(c) Is it possible for the mode to change? Explain.Yes, depending on the range of the data values.No, the only change is an increased frequency of 1 for the extreme values.    No, all values will still occur at the same frequency.Yes, depending on which data value occurs most frequently after the data are changed.Yes, depending on the number a data values.

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Solution

(a) Yes, the mean changes. The mean is calculated by summing all the data values and dividing by the number of data values. If the highest value is increased by 10 and the lowest is decreased by 10, the sum of the data values changes, which in turn changes the mean. The number of data values does not change.

(b) No, the median does not change. The median is the middle value when the data values are arranged in ascending order. Changing the highest and lowest values does not affect the position of the middle value, so the median remains the same. The sum of the data values and the number of data values are irrelevant when calculating the median.

(c) No, it is not possible for the mode to change. The mode is the data value that occurs most frequently. Changing the highest and lowest values does not affect the frequency of the other data values, so the mode remains the same. The range of the data values and the number of data values are irrelevant when determining the mode.

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