def is_sorted(data):
    """
    Checks if given data are sorted ascendantly.
    
    Args:
        data: (float,)
            Data to check.
    
    Returns:
        bool
            True if sorted, False otherwise.
    """
    for i in range(data.size - 1):
        if data[i + 1] < data[i]:
            return False
    return True
