stat ch 7.1 hw

stat ch 7.1 hw - HW 7.1-7.3 FA10 1 of 5

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Web Assign HW 7.1-7.3 FA10 (Homework) Chris O'Neal STAT 7770 FA10, Fall 2010 Instructor: Chandler Pike Current Score : 0 / 100 Due : Monday, October 4, 2010 05:30 PM EDT 0/8 submissions 1. –/26 points According to a recent Current Population Reports , the population distribution of number of years of education for self-employed individuals in the United States has a mean of 13.3 and a standard deviation of 2.2. (a) Identify the random variable X whose distribution is described here. (b) Find the mean and standard error of the sampling distribution of for a random sample of size 90. Mean = (1 decimal place) Standard Error = (5 decimal places) (c) Find the mean and standard error of the sampling distribution of for a random sample of size 399. Mean = (1 decimal place) Standard Error = (5 decimal places) (d) Describe the effect of increasing n . (e) If a sample of size 399 is selected from this population, what is the probability that the sample average will be less than 13.7? probability = (4 decimal places) (f) Suppose a random sample of 4 self-employed individuals is selected at random from the population described above. The sample data values are: 14, 10, 13, 12. (i) The sample mean is (2 decimal places) (ii) The sample standard deviation is (4 decimal places) 2. –/16 points number of self-employed individuals number of years of education number of educated individuals in the United States number of self-employed individuals in the United States The mean increases. The mean stays the same. The mean decreases. The standard error increases. The standard error stays the same. The standard error decreases. HW 7.1-7.3 FA10 http:[email protected]/student.pl?c=2010092913. .. 1 of 5 9/29/2010 9:44 AM
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
At a university, 61% of the 7400 students are female. The student newspaper reports results of a survey of a random sample of 50 students about various topics involving alcohol abuse, such as participation in binge drinking. They report that their sample contained 26 females. Gender is a categorical variable. To set up a probability distribution where the random variable
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/08/2012 for the course STAT 2000 taught by Professor Smith during the Fall '08 term at UGA.

Page1 / 5

stat ch 7.1 hw - HW 7.1-7.3 FA10 1 of 5

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online