statistics

posted by .

Question 1

A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of 15 students from their school and ask how many hours each slept last night.

A stemplot and boxplot of the numbers of hours are shown here.

  • statistics -

    Plots are not shown. Copy and paste might not be working.

    Also, what is your question?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    College students average 7.8 hours of sleep per night with a standard deviation of 45 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9 hours?
  2. statistics

    researchers believe a new sleep on average 10 hours per night ( ยต = 10), with a population standard deviation of 2.3 hours(s=2.3) it is assume that the number of hours of sleep per night is normal distributed , however you think this …
  3. Statistics

    A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident …
  4. AP Statistics

    A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of …
  5. statistics

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: On a week night, what percentage …
  6. Statistics

    Suppose that hours of sleep per night for single adults between 30 and 40 years of age are normally distributed with a mean of 6.7 hours and a standard deviation of 1.1 hours. What proportion of adults sleep longer than 4.5 hours per …
  7. statistics

    (10 pts) Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers …
  8. Math

    Sorry about last post. :( Graph: Students Hours _______________ Jack | 4.5 Mike | 6.25 Adam | 3 Jim | 2.5 Marty| 7 Ben | 6.75 At your high school, you randomly surveyed male students to find that they play video games a certain amount …
  9. advanced alh

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: About what proportion of students …
  10. statistics

    The weekly study times for all students in a school are normally distributed with μ = 18 hours and σ = 6 hours. If 36 students are randomly selected, find the probability that their mean study time is greater than 20 hours. …

More Similar Questions