statistics

posted by .

A sample of the number of study per week of college students is collected. Some of the sample results of the survey are given in the following table
Study Hr 4, 10, 20,24, 34, 36, 42
Z score -2.5,-1.75,-0.5,0, 1.25,1.5,2.25
P. Rank 10, 25, 35, 40, 50, 75 95

Q1- The mean study time for all the students
Q2- The median study time for all the student
Q3- The percent of college students who study between 20 and 36 hrs per week
Q4- The study time representing the 1st quartile
Q5- The Standard Deviation study time for all the students
Q5- The study time corresponding to a Z score of 1.75

  • statistics -

    We do not do your work for you. Once you have attempted to answer your questions, we will be happy to give you feedback on your work. Although it might require more time and effort, you will learn more if you do your own work. Isn't that why you go to school?

    However, I will give you a start.

    1. Z = 0 = mean

    5. Z = (score-mean)/SD

    Once you have found the mean, insert its value plus the Z and raw score for one student to solve for SD.

    Use that data for 3 by finding table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the corresponding Z scores.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school week. A skeptic suspects that they study less than that on the average. A class survey finds that the average …
  2. Research and Statistics

    5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics?
  3. statistic

    1. Compute descriptive statistics for liberal art colleges and research universities in the Excel file colleges and universities. Compare the two types of colleges . what can you conclude.?
  4. statistics

    In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test. The data collected in this study would …
  5. 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 …
  6. Statistics

    4) The table below shows the study times and test scores for a number of students. Study Time (minutes) (x) 9 16 21 26 33 Test Score (y) 59 61 64 65 73 a)What line best relates study time to the test score?
  7. statistics

    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 …
  8. statistics

    4. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use web-calculator to answer the following questions. Instead, you …
  9. statistics

    In order to study whether IQ level is related to birth order, data were collected from a sample of 540 students on their birth order (Oldest/In Between/Youngest) and their score on an IQ test. The data collected in this study would …
  10. 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 …

More Similar Questions