In a study of intraobserver variability in assessing cervical smears, a number of slides were screened for the presence or absence of abnormal squamous cells. Each slide was screened by a particular...

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Extracted text: In a study of intraobserver variability in assessing cervical smears, a number of slides were screened for the presence or absence of abnormal squamous cells. Each slide was screened by a particular observer and then rescreened six months later by the same observer. The results are shown in table below. Second screening First screening Present Absent Total Present 1,823 455 Absent 363 634 Total Find the probability that abnormal squamous cells were found to be absent in both screenings. Express your answer in 4 decimal places.