A stratified sample is a sample where: * 1 point O you go through the population sequentially and select members at regular intervals O the population has the same proportion of members from each identified group as the sample does O randomly chosen groups are surveyed there are several levels of random sampling O none of the above Measurement bias is: * 1 point O is a form of sampling bias O occurs when the data-collection method incorrectly estimates a characteristic of the population O occurs when the sampling frame does not reflect the characteristics of the population O occurs when people give false or misleading answers O none of the above