a study of an association between which ear i...
a study of an association between which ear is used for cell phone calls and whether the subject is left - handed or right - handed began with a survey e - mailed to 5000 people, and 717 surveys were returned. (otology relates to the ear and hearing.) what percentage of the 5000 surveys were returned? does that response rate appear to be low? in general, what is a problem with a very low response rate? of the 5000 surveys, % were returned. this response rate to be low. (round to the nearest whole number as needed.) what is a problem with a very low response rate? a. it creates a serious potential for confounding which creates a serious potential for erroneous conclusions. b. it indicates a lack of blinding which creates a serious potential for getting a biased sample. c. it creates a serious potential for getting a biased sample that consists of those with a special interest in the topic. d. it does not allow for sufficient replication to produce a random sample.
Answer
# Explanation:
## Step1: Calculate response rate percentage
The formula for response rate is $\frac{\text{Number of returned surveys}}{\text{Total number of surveys sent}}\times100\%$. Here, the number of returned surveys is 717 and the total number of surveys sent is 5000. So the response rate is $\frac{717}{5000}\times100\%$.
$\frac{717}{5000}\times100\%=\frac{717\times100}{5000}=\frac{71700}{5000} = 14.34\%$. Rounding to the nearest whole - number, we get 14%.
## Step2: Analyze low - response rate issues
A low response rate often leads to a biased sample because those who respond are more likely to be the ones with a special interest in the topic. For example, if it's a survey about a particular hobby, only those passionate about that hobby may respond.
# Answer:
Of the 5000 surveys, 14% were returned. This response rate appears to be low.
The problem with a very low response rate is C. It creates a serious potential for getting a biased sample that consists of those with a special interest in the topic.