Researchers conducted a study to examine the mental health and stress experiences of people living in several communities in a certain region that had experienced highly destructive wildfires. In the methods section of their article, the researchers noted that: "Random digit dial methodology was used to recruit participants (N= 402) from residences with a home phone in the three affected cities in the region." These are procedures in which phone numbers to call potential participants are randomly generated by a computer. Explain to a person who has never had a course in statistics (a) why this method of sampling might be used and (b) why it may be a problem if not everyone called agreed to be interviewed. ... (a) Choose the correct answer below. O A. This method is random for all people in the communities, making it an ideal sampling method, since the sample will be representative of the population of

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Researchers conducted a study to examine the mental health and stress experiences of people living in several communities in a certain region that had
experienced highly destructive wildfires. In the methods section of their article, the researchers noted that: "Random digit dial methodology was used to recruit
participants (N= 402) from residences with a home phone in the three affected cities in the region." These are procedures in which phone numbers to call potential
participants are randomly generated by a computer. Explain to a person who has never had a course in statistics (a) why this method of sampling might be used and
(b) why it may be a problem if not everyone called agreed to be interviewed.
(a) Choose the correct answer below.
O A. This method is random for all people in the communities, making it an ideal sampling method, since the sample will be representative of the population of
people in the communities.
O B. This method is random for people in the communities who have home phones, this method is convenient, and it might be thought that mental health and
stress experiences for people with home phones are different from those of people without home phones.
O C. This method is haphazard, making it an ideal sampling method, since the sample will be representative of the population of people in the communities.
O D. This method is random for people in the communities who have home phones, this method is convenient, and it might be thought that mental health and
stress experiences are similar across people with and without home phones.
(b) Choose the correct answer below.
O A. People who do not agree to be interviewed might have systematically different mental health and stress experiences from people who do agree to be
interviewed. If this were the case, the sample would not represent the population of people in the communities.
O B. If not everyone called agreed to be interviewed, then the scores from the sample would not likely follow a normal distribution. If the scores do not follow a
normal distribution, then it would not be possible to perform a lot of useful statistical analysis.
OC. If not everyone called agreed to be interviewed, then the resulting sample would likely be too small for any statistical analysis to be performed at al.
O D. If not everyone called agreed to be interviewed, then the variance of scores in the sample may be too small for a lot of useful statistical analysis to be
performed.
Transcribed Image Text:Researchers conducted a study to examine the mental health and stress experiences of people living in several communities in a certain region that had experienced highly destructive wildfires. In the methods section of their article, the researchers noted that: "Random digit dial methodology was used to recruit participants (N= 402) from residences with a home phone in the three affected cities in the region." These are procedures in which phone numbers to call potential participants are randomly generated by a computer. Explain to a person who has never had a course in statistics (a) why this method of sampling might be used and (b) why it may be a problem if not everyone called agreed to be interviewed. (a) Choose the correct answer below. O A. This method is random for all people in the communities, making it an ideal sampling method, since the sample will be representative of the population of people in the communities. O B. This method is random for people in the communities who have home phones, this method is convenient, and it might be thought that mental health and stress experiences for people with home phones are different from those of people without home phones. O C. This method is haphazard, making it an ideal sampling method, since the sample will be representative of the population of people in the communities. O D. This method is random for people in the communities who have home phones, this method is convenient, and it might be thought that mental health and stress experiences are similar across people with and without home phones. (b) Choose the correct answer below. O A. People who do not agree to be interviewed might have systematically different mental health and stress experiences from people who do agree to be interviewed. If this were the case, the sample would not represent the population of people in the communities. O B. If not everyone called agreed to be interviewed, then the scores from the sample would not likely follow a normal distribution. If the scores do not follow a normal distribution, then it would not be possible to perform a lot of useful statistical analysis. OC. If not everyone called agreed to be interviewed, then the resulting sample would likely be too small for any statistical analysis to be performed at al. O D. If not everyone called agreed to be interviewed, then the variance of scores in the sample may be too small for a lot of useful statistical analysis to be performed.
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