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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.
A. Give a large-sample 95% confidence interval for the proportion of all drivers who ran one or more of the last ten red lights they met.
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?
A randomly selected resident turns out to be male (that is, it is given that the resident is male). Compute the probability that he is in favor of building the bridge.
1. a random sample of 16 size d batteries for cars yield a mean of 2.8 hours with standard deviation 1.3 hours.a find
the high school dropout rate in the state in the state for the year 2000 was 10.8 one school district who adopted the
q1.acid rain has caused many lakes to become more acidic. a lake is considered nonacidic if the ph level is greater
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
for each of the variables below state what level of measurement it is and is it discrete or continous.example height-ir
Excel or Minitab to generate a list of 40 flyers identification numbers so that those identified can surveyed.
A nutritionist heard on the radio an amazing new diet drink that if taken at bedtime you will lose weight as you're sleeping. To top it off you can eat anything you want because the diet fuel will burn it off.
Random sample of 36 theaters resulted in mean of $7.80. Population standard deviation is $1.00. Determine conclusion can be made at 10% significance level? How about 5% significance level?
Random samples of 25 observations were selected from each of 3 populations. For these data, SSTR= 120 and SSE = 216.
the below two question must have a minimum 250 word count and use examples to support the solution. only use usa based
university city is a town of more than 200000 persons with over 50000 university and community college students. it
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