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Problem-Solving and Data Analysis / One-variable data: Distributions and measures of center and spread Difficulty: Easy

The bar graph summarizes the charge, in kilowatt-hours $(kWh)$ , a battery received each day for $15$ days.

For how many of these $15$ days did the battery receive a charge of $0 kWh$ ?

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Explanation

Choice D is correct. It's given that the bar graph summarizes the charge, in kilowatt-hours $(kWh)$ , a battery received each day for $15$ days. The height of each bar in the bar graph shown represents the number of days the battery received the charge, in $kWh$ , specified at the bottom of the bar. The bar for a charge of $0 kWh$ reaches a height of $6$ . Therefore, the battery received a charge of $0 kWh$ for $6$ of these days.

Choice A is incorrect. This is the charge, in $kWh$ , that the battery received, not the number of days the battery received this charge.

Choice B is incorrect. This is the number of days the battery received a charge of either $8$ , $16$ , or $23$ $kWh$ .

Choice C is incorrect. This is the number of days the battery received a charge of $11$ $kWh$ .