Explain the sources of bias in given problem

Reference no: EM131766880

Question: Running red lights A random digit dialing telephone survey of 880 drivers asked, "Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?" Of the 880 respondents, 171 admitted that at least one light had been red.35

(a) Construct and interpret a 95% confidence interval for the population proportion.

(b) Nonresponse is a practical problem for this survey-only 21.6% of calls that reached a live person were completed. Another practical problem is that people may not give truthful answers. What is the likely direction of the bias: Do you think more or fewer than 171 of the 880 respondents really ran a red light? Why? Are these sources of bias included in the margin of error?

Reference no: EM131766880

Questions Cloud

Obtain a margin of error in a confidence interval : Do you go to church? The Gallup Poll plans to ask a random sample of adults whether they attended a religious service in the last 7 days.

Draft of your own academic essay that establishes : draft of your own academic essay that establishes a point about either the cause or effect of this relevant change

What research is being conducted on animal you are visiting : What research is being conducted on the animal/ecosystem you're visiting. Name a scientist and describe their research.

Determine the level of evidence identified in the review : Determine an evidence-based quantitative article from the search that contains an evidence-based randomized control trial.

Explain the sources of bias in given problem : Nonresponse is a practical problem for this survey-only 21.6% of calls that reached a live person were completed.

Amount of competition in the transportation business : Are consumer's better off for having a highly regulated taxis industry? Are taxis owners better off by reducing the amount of competition in the transportation.

What will be your working case definition : Answer following questions about your investigation. What will be your working case definition? How will you find cases systematically and record information?

What is his marginal tax rate on given income : What is his marginal rate if, instead, he had $48,250 of additional deductions

Probability that the average amount spent : What is the probability that the average amount spent on Black weekend from this sample was less than $500?

User Account

All Pages