Statistics 5021 Homework 2 There are 20 total points (1 point for each part of each question). One question will be graded for correctness. This homework is due Thursday, February 10 in your lab section. 1. Dene the following terms and create your own exa
Stat 5021, First exam, Fall '05
Name
Forty four people took this exam. The mean score was 75.9 with a standard deviation of 21.5. 1. Let X be a random variable with cumulative distribution if x < 1 0 0.1 if 1 x < 5 0.3 if 5 x < 7 F (x) = 0.7 if 7 x < 9 0.
Introduction to condence intervals Examples
1. The temperature in degrees F of 20 individuals was measured: 101.8 98.3 95.9 97.2 100.2 100.3 99.7 99.2 97.5 96.8 99.4 96.5 97.3 97.9 98.2 103.8 101.0 99.4 97.8 93.5
The observed sample mean is x = 98.585 deg
Statistics 5021 Homework 1 There are 20 total points (1 point for each part of each question excluding question 1, which is worth 0 points). One question will be graded for correctness. This homework is due Thursday, February 3 in your lab section. 1. The
Statistics 5021 Homework 2 (solutions)
There are 20 total points (1 point for each part of each question). One question will be
graded for correctness. This homework is due Tuesday, September 27 in your lab section.
1. Dene the following terms and create
Introduction to condence intervals Examples (with solutions) 1. The temperature in degrees F of 20 individuals was measured: 101.8 98.3 95.9 97.2 100.2 100.3 99.7 99.2 97.5 96.8 99.4 96.5 97.3 97.9 98.2 103.8 101.0 99.4 97.8 93.5
The observed sample mean
Statistics 5021 Homework 5 (solutions) There are 20 total points (0.5 points for each part of each question and 8 points for handing in the assignment). One question will be graded for correctness. This homework is due Thursday, March 24 in your lab secti
Statistics 5021 Homework 1 (solutions) There are 20 total points (1 point for each part of each question excluding question 1, which is worth 0 points). One question will be graded for correctness. This homework is due Thursday, February 3 in your lab sec
Statistics 5021 Homework 6 (solutions) There are 20 total points. This homework is due Thursday, April 7 in your lab section. In this homework, you will analyze a dataset (preferably using R). The data are from an experiment where 24 animals were assigned
Statistics 5021 Homework 2 (solutions) There are 20 total points (1 point for each part of each question). One question will be graded for correctness. This homework is due Thursday, February 10 in your lab section. 1. Dene the following terms and create
Statistics 5021 Midterm 2
Name: Internet-ID: There are 3 questions, with point values given in parentheses for each part of each question. Show all work to receive credit. You are allowed two 8.5x11 inch sheets of paper with your notes written on both sid
Daniels 1
Doug Daniels
Analysis of Algorithms (NCSC-6021-01)
Fall 2006
11/26/2006
Week 12 Assignment
Problem 30.2-5:
Describe the generalization of the FFT procedure to the case in which n is a power of 3. Give a
recurrence for the running time, and solve
1
#hhhhhh
x=c(13,22,8,17,9,12,15,25,14)
mean(x)
# [1] 15
var(x)
# [1] 31.5
range(x)
# [1] 8 25
quantile(x,0.25)
# 25%
# 12
quantile(x,0.65)
# 65%
# 15.4
The mean of x is 15. The variation of x is 31.5. The range of x is 8 to 25. The 25 percent
quartile is
Statistics 5021 Homework 1 (solutions)
There are 20 total points (1 point for each part of each question excluding question 1, which
is worth 0 points). One question will be graded for correctness. This homework is due
Tuesday, September 20 in your lab se
Notes on simulations with R
Adam J. Rothman
November 3, 2011
Contents
1 Introduction
2
2 Inference for , the success probability or Bernoulli population proportion
2.1 Review of assumptions and formulas . . . . . . . . . . . . . . . . . . . . . .
2.2 Simu
Comparing two subpopulations or
processes
1
Introduction
In previous chapters, we introduced models for a characteristic of units in a population,
models for a process, and developed procedures (condence intervals & hypothesis
tests) to make inference fo
Estimators, Estimates, and Sampling
distributions
1
Review
Denition: experiment
action or process that generates outcomes. Only one outcome can occur and we are usually
uncertain which outcome this will be.
Denition: random variable
a numerical measuremen
Comparing two subpopulations or processes Examples (with solutions)
1. A company produces special running shoes. In their advertisement, they claim that
using their shoes will make runners faster. Each of the 85 members of the football
team at Eastern Mic
Introduction to Condence Intervals
1
Introduction
When analyzing data, we view our observations x1 , . . . , xn as a realization of a random
sample X1 , . . . , Xn from a distribution with unknown parameters. We then use x1 , . . . , xn
to compute estimat
Introduction to hypothesis tests Examples (with solutions)
1. A grocery store had an average checkout time of 3 minutes. The management wished to
improve this and installed a new checkout system. To test the new performance, they
measured the checkout tim
Introduction to hypothesis tests
1
Introduction
1.1
Denitions and examples
Denition: hypothesis
a claim about a statistical model.
Examples
Population model: Suppose that heights of US residents are modeled with a distribution with unknown mean and unkno
Statistics 5021 Homework 3 (solutions)
There are 20 total points (1 point for each part of each question and 3 points for handing
in the assignment). One question will be graded for correctness. This homework is due
Monday, October 10 in lecture.
1. Dene
Statistics 5021 Homework 4 (solutions)
There are 20 total points (1 point for each part of each question and 8 points for handing
in the assignment). One question will be graded for correctness. This homework is due
Tuesday, October 25 in your lab section
Statistics 5021 Homework 5
There are 20 total points (1 point for each part of each question and 6 points for handing in
the assignment). One question will be graded for correctness. This homework is due Friday,
November 4 in lecture.
1. James is conducti
Introduction to Algorithms, Spring 2010 Homework 3 solutions
9.3-8
1: function FIND -MEDIAN (X , Y, n) 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18:
k = n/2 if k 2 then Merge X and Y , and return the median of the merged array. if n is odd t
CIS 23 Analysis of Algorithms
Midterm 1
General guidelines: Answer as many questions as you can to the best of your ability. Partial credit will be given to incorrect answers with a good argument. Giving proofs is required to obtain full credit, unless st
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