statistics

posted by .

To determine how many hours per week freshmen college students watch television, a random sample of 225 students was selected. It was determined that the students in the sample spent an average of 35 hours watching TV per week. The population standard deviation is known to be 12 hours. Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week

  • statistics -

    95% = mean ± 1.96 SEm

    SEm = SD/√n

    Insert values and calculate.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a standard deviation of 6 hours, what is the required sample size if …
  2. statistics

    Six students from a statistic class reported the number of hours of television they watched per week. Here are their data: 8,10,5,14,3,6. What is the median number of hours of television watched per week for this sample of 6 students
  3. Statistics

    28. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week. Based on a simple random sample, they surveyed 144 students. The statistics …
  4. statistics

    A sample of 400 high school students showed that they spend an average of 70 minutes a day watching television with a standard deviation of 14 minutes. Another sample of 500 college students showed that they spend an average of 55 …
  5. Hypothesis - Statistics

    At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants …
  6. Hypothesis Statistics

    At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants …
  7. Statistics

    A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What …
  8. statistics

    The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 …
  9. satistics

    Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6. This mean lies 0.4 standard deviations below the mean of the sampling distribution. If a second sample of …
  10. Math

    The following table represents a grouped frequency distribution of the number of hours spent on the computer per week for students. What percentage of students used the computer between 7 and 14.9 hours per week?

More Similar Questions