You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.8 KiB
75 lines
2.8 KiB
# frozen_string_literal: true
|
|
|
|
class StudentResponseRateCalculator < ResponseRateCalculator
|
|
def raw_response_rate
|
|
rates_by_grade.values.length.positive? ? weighted_average : 0
|
|
end
|
|
|
|
def weighted_average
|
|
num_possible_responses = 0.0
|
|
rates_by_grade.keys.map do |grade|
|
|
num_possible_responses += enrollment_by_grade[grade]
|
|
end
|
|
rates_by_grade.map do |grade, rate|
|
|
rate * (enrollment_by_grade[grade] / num_possible_responses)
|
|
end.sum
|
|
end
|
|
|
|
def rates_by_grade
|
|
@rates_by_grade ||= enrollment_by_grade.map do |grade, num_of_students_in_grade|
|
|
sufficient_survey_items = survey_items_with_sufficient_responses(grade:).keys
|
|
actual_response_count_for_grade = SurveyItemResponse.where(school:, academic_year:, grade:,
|
|
survey_item: sufficient_survey_items).count.to_f
|
|
count_of_survey_items_with_sufficient_responses = survey_item_count(grade:)
|
|
if count_of_survey_items_with_sufficient_responses.nil? || count_of_survey_items_with_sufficient_responses.zero? || num_of_students_in_grade.nil? || num_of_students_in_grade.zero?
|
|
next nil
|
|
end
|
|
|
|
[grade, actual_response_count_for_grade / count_of_survey_items_with_sufficient_responses / num_of_students_in_grade * 100]
|
|
end.compact.to_h
|
|
end
|
|
|
|
def enrollment_by_grade
|
|
@enrollment_by_grade ||= respondents.counts_by_grade
|
|
end
|
|
|
|
def total_enrollment
|
|
respondents.counts_by_grade.sum
|
|
end
|
|
|
|
def survey_items_have_sufficient_responses?
|
|
rates_by_grade.values.length.positive?
|
|
end
|
|
|
|
def survey_items_with_sufficient_responses(grade:)
|
|
@survey_items_with_sufficient_responses ||= Hash.new do |memo, grade|
|
|
threshold = 10
|
|
quarter_of_grade = enrollment_by_grade[grade] / 4
|
|
threshold = threshold > quarter_of_grade ? quarter_of_grade : threshold
|
|
memo[grade] = SurveyItem.joins('inner join survey_item_responses on survey_item_responses.survey_item_id = survey_items.id')
|
|
.student_survey_items
|
|
.where("survey_item_responses.school": school, "survey_item_responses.academic_year": academic_year, "survey_item_responses.grade": grade, "survey_item_responses.survey_item_id": subcategory.survey_items.student_survey_items)
|
|
.group('survey_items.id')
|
|
.having("count(*) >= #{threshold}")
|
|
.count
|
|
end
|
|
@survey_items_with_sufficient_responses[grade]
|
|
end
|
|
|
|
def survey_item_count(grade:)
|
|
survey_items_with_sufficient_responses(grade:).count
|
|
end
|
|
|
|
def respondents
|
|
@respondents ||= Respondent.find_by(school:, academic_year:)
|
|
end
|
|
|
|
def total_possible_responses
|
|
@total_possible_responses ||= begin
|
|
return 0 unless respondents.present?
|
|
|
|
respondents.total_students
|
|
end
|
|
end
|
|
end
|