Question

Name: The mayors office wants to know how people in the city feel about the condition of the city's roads. They place an announcement in the newspaper asking residents to email their opinions to the mayor's office. Five hundred people send e als and about 84% of the responses indicate displeasure with the condition of the city's roads A) This is a simple random sample. It gives very accurate results B) This is a simple random sample. The resuits are not biased, but the sample is so small that variation will be high s a census because all city residents had a chance to provide their opinions. Itgives very accurate results. This is a voluntary response sample. It will almost certainly overestimate the level of displeasure the city's residents. D) This is a voluntary response sample. It wil almost certainly underestimate the level of displeasure among sample. It will almost certainly underestimate the level of displeasure among the city's residents 8. A good sampling method has Small bias and small variability ) Large bias and small variability C) Small bias and large variability D) Large bias and large variability A sampling method that best avoids bias is A) A voluntary response sample B) A convenience sample DA simple random sample D) None of the choices are correct 9. 10. If we took a simple random sample of 1,700 people from California (population 39 million) and a simple random sample of 1,000 people from Columbus (population 825,000) which sample would have the smaller margin of error? A) Columbus, because 1,000/825,000 is more than 1,700/39,000,000. B) Columbus, because it has the smaller population. C) California, because the sample size (1,700) is larger than for Columbus (1,000). D) Columbus, because it has the larger population. E) Both would be the same, because simple random samples (SRS) are taken in both places. 11. The following question appears on a sample survey. Is the question biased? If so, suggest changes. Should a company enforce a strict dress code? 12. A survey was sent to college students. The sample size was 500. When asked whether or not they liked Frank Sinatra's music, 325 of these students did not give any answer. This sample: A) Is a stratified sample. B) Is a simple random sample. C) Is a census. D) Is a voluntary response sample. E) Will be biased due to non-response.
Solve 7,10,11,12 in business stat 2430

Answer 1

7) Correct option is E

This is voluntary response sample . It will almost certainly understimated the level of displeasure among the city's resident.

8) correct option is A

Small bias and small variability

9) correct option is C

A simple random sample.

10) correct option is C

California because sample size(1700) is larger than for Columbus (1000)

11) this is biased because answer will be voluntarily .

12) correct option is E

The sample will be biased due to non-reponse.