Symbol for the population mean : Formula:
Symbol for the sample mean: Formula:
A. skewed to the right
B. skewed to the left
(positively skewed)
(negatively skewed)
C. symmetric
Population Variance:
2
There are two hypotheses being tested:
1.
NULL HYPOTHESIS (H0 H-knot) vs. 2. ALTERNATIVE HYPOTHESIS (HA).
Hypothesis testing parallels a criminal trial where the jury must decide whether the person ac
Probability and Sampling
Distributions
Randomness and Probability Models
Sections 4.1 and 4.2
Objectives (Sections 4.1 and
4.2)
Randomness and Probability Models
Randomness and probability
Probability
1
STAT 2110
HOMEWORK #5 ANSWER KEY-Not Collected
Chapter 1 Section 1.3
The following are answers to the problems that were assigned that will not be
collected. Please see me with any questions.
Exerci
1
STAT 2110 - 24 points
HOMEWORK #5 ANSWER KEY- collected
Chapter 1 Section 1.3
Problem #1
a) (1 pt.) X = amount of time it takes a competitor to complete a certain obstacle course;
X~U(30, 65)
b) (1
Section1.3DensityCurvesandtheNormal
DistributionsPart2LAB
The 68-95-99.7 rule
Since the normal distribution is symmetric, the approximate percentages may
be drawn as:
The689599.7rulealsoappliestosampl
STAT 2110
HOMEWORK #4
Chapter 1 Section 1.3
Completion date: Thursday, February 5
Read pages 41-48 in the textbook.
The following problems will not be collected. Check your answers with the
answer key
Wenjie Sima Teaching Assistant for STAT2110 section 1001 and 1002
Homework #2 Solution
(10 Points)
Type your name and class Section at the top of the header of your Word file.
For each graph that you
Homework 1 Solution
(10 points)
Download Data from Class Survey: CLASS-DATA-FALL2015.MTW
Download this file to your Desktop by going to Files, Chapter 1-1. Click on CLASSDATA-FALL2015.MTW. You may hav
Exam I Review
Common Mistakes
Check outlier
Ex: Yes. 45 is an outlier, since 45 3 = 19 > 1.5 = 16.5 (from Quiz 1)
Write down probability statement for any probability problem
Ex: P(2<X<5), P(A and B)
WAREN SPORTS SUPPLY, YEAR-END WORKSHEET, DECEMBER 31, 2009
TRANSACTIONS LIST A
(Accounts with no activity in this worksheet are excluded in this solution.)
12/31/2008
ACCT
ACCOUNT
POST CLOSING
NO.
TIT
Jake Kanter
STAT 2110
11:30
Problem 1
X = the average number of rounds of golf played per year by 12 randomly selected physicians
X~N, X-bar ~N (=?, x-bar= 12/12 = 3.4641)
Sample mean:
Margin of error
Homework 1
Yuntao Xu
STAT 2110
Exercise 1 (2 Points)
Here are some question topics from school. Sort them according to whether they will yield
categorical or numerical data.
Amount of money earned las