1. A call evaluation device, comprising: a storage unit that stores: audio information of a call performed by using a first terminal that a first speaker uses and a second terminal that a second speaker uses, an utterance for each of the first speaker and the second speaker being associated with a date and time or an elapsed time from a start of the call; screen identification information to identify screen information displayed on the second terminal; and display history information in which the screen identification information of the screen information displayed on the second terminal is associated with a date and time or an elapsed time, from a start of the call, at which the screen is displayed; an audio recording unit that associates the utterance for each of the first speaker and the second speaker with the screen information by using the date and time or the elapsed time from the start of the call associated with the utterance for each of the first speaker and the second speaker in the audio information, the date and time or the elapsed time, from the start of the call, at which the screen information is displayed, and the screen identification information of the displayed screen information; an evaluation unit that calculates a question and answer number for the screen information by defining a combination of an utterance of the first speaker and an utterance of the second speaker, which are associated with the same screen information, as a question and answer, obtains an utterance time of the second speaker for each question and answer, and generates display information that causes an output device to display the question and answer number for the screen information and the utterance time of the second speaker for each question and answer; and a transmission unit that transmits the generated display information to the output device, wherein the storage unit further stores a question and answer number threshold, which is a threshold of the question and answer number, and an utterance time threshold, which is a threshold of the utterance time, associated with one another for each piece of screen information, wherein the evaluation unit compares the question and answer number calculated for each piece of screen information with the question and answer number threshold, and adds to the display information to cause the output device to display information on a result of the comparison regarding the question and answer number, and the evaluation unit compares the utterance time of the second speaker for each question and answer with the utterance time threshold, and adds to the display information to cause the output device to display information on a result of the comparison regarding the utterance time.
1. A call evaluation device, comprising: a storage unit that stores: audio information of a call performed by using a first terminal that a first speaker uses and a second terminal that a second speaker uses, an utterance for each of the first speaker and the second speaker being associated with a date and time or an elapsed time from a start of the call; screen identification information to identify screen information displayed on the second terminal; and display history information in which the screen identification information of the screen information displayed on the second terminal is associated with a date and time or an elapsed time, from a start of the call, at which the screen is displayed; an audio recording unit that associates the utterance for each of the first speaker and the second speaker with the screen information by using the date and time or the elapsed time from the start of the call associated with the utterance for each of the first speaker and the second speaker in the audio information, the date and time or the elapsed time, from the start of the call, at which the screen information is displayed, and the screen identification information of the displayed screen information; an evaluation unit that calculates a question and answer number for the screen information by defining a combination of an utterance of the first speaker and an utterance of the second speaker, which are associated with the same screen information, as a question and answer, obtains an utterance time of the second speaker for each question and answer, and generates display information that causes an output device to display the question and answer number for the screen information and the utterance time of the second speaker for each question and answer; and a transmission unit that transmits the generated display information to the output device, wherein the storage unit further stores a question and answer number threshold, which is a threshold of the question and answer number, and an utterance time threshold, which is a threshold of the utterance time, associated with one another for each piece of screen information, wherein the evaluation unit compares the question and answer number calculated for each piece of screen information with the question and answer number threshold, and adds to the display information to cause the output device to display information on a result of the comparison regarding the question and answer number, and the evaluation unit compares the utterance time of the second speaker for each question and answer with the utterance time threshold, and adds to the display information to cause the output device to display information on a result of the comparison regarding the utterance time. 2. The call evaluation device according to claim 1 , wherein the question and answer number threshold is an average value of the question and answer of the first speaker and the second speaker corresponding to the same screen information in a plurality of calls in the past wherein the utterance time threshold is an average value of the utterance time of the second speaker corresponding to the same screen information in a plurality of calls in the past; wherein the storage unit stores the average value of the question and answer number and the average value of the utterance time of the second speaker in association with the screen information.