def checkNull(df, columnName, acceptableAmount):
    """

     # Run QA checks to confirm data population
    isNameValid = checkNull(df,'full_name',.9)
    isAgeValid = checkNull(df,'age',.9)
    isGenderValid = checkNull(df,'gender',1)

    :param df:
    :param columnName:
    :param acceptableAmount:
    :return:
    """
    acceptableQuality = False
    nullPercent = df[columnName].isnull().sum() / df[columnName].count()
    if nullPercent >= acceptableAmount:
        acceptableQuality = True
    return acceptableQuality
