The two responses that illustrate improvements in productivity are:
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After adopting a new typing strategy, a data scientist is able to provide more data services to clients.
This indicates that the data scientist is working more efficiently due to the new strategy, allowing for an increased output of services without necessarily increasing hours worked. -
After practicing at home, a dishwasher has doubled the number of dishes he can wash in a single shift.
This shows a significant improvement in the dishwasher's productivity, as he is now able to complete twice the amount of work within the same timeframe.
The other options involve increases in output due to additional resources or time rather than increases in productivity per unit of input.