Stat 151 Midterm Version 111
LAST NAME: _
FIRST NAME: _
STAT 151 SECTION: _
Instructions:
1) Personal items must be placed aside prior to the start of the exam.
2) All portable electronic devices must be turned off, including cell phones, pagers, etc.
3)
Stat 151 Practice Midterm 1
l. A football league tests players for performance enhancing drugs. Ofcials put all players
together and test randomly chosen players. What kind of sample is this?
A) Simple random sample
B) Stratied random sample <
C) Volunta
Exercises for Chapter 8
1. Crop researchers plant 70 plots with a new variety of corn. The average yield
for these plots is 130 bushels per acre. Suppose that = 10 bushels per acre.
Find a 90% confidence interval for the mean yield for this variety of cor
Exercises for Chapter 2
1. The following data represent responses to a question asked in a survey of 40
college students majoring in business. The question was What is your major?
(Accountancy = A; Computer Information System = C; Retailing = R).
A
C
C
R
Exercises for Chapter 5
1. Let A and B denote events from the sample space S of some random experiment.
= 0.45, and P (A B) = 0.10. What is
(a) Suppose P (A) = 0.20, P (B)
P (A B)?
(b) Suppose P (A B) = 0.43 and P (A B) = 0.67. What is P (A) + P (B)?
(c)
Exercises for Chapter 10
1. A fishprocessing company is concerned about the shelf life of its new cat
food. A sample examined in Halifax (n = 35) had an acceptable mean shelf life
of 13 months, with a standard deviation of 1.44 months. But a second sampl
Exercises for Chapter 4
1. Can statistical analysis alone be used to establish casual relationship? Explain.
2. If in an observational study the statistical analysis has shown convincing
evidence that the mean levels differed in two groups (treatment and
Exercises for Chapter 9
1. The director of manufacturing at a clothing factory needs to determine
whether a new machine is producing a particular type of cloth according to the
manufacturers specification, which indicate that the cloth should have a mean
Exercises for Chapter 6
1. A machining operation produces bearing with diameters that are normally
distributed with a mean of 3.0005 inches and a standard deviation of 0.0010 inch.
Specifications require the bearing diameters to lie in the interval 3.000
Exercises for Chapter 3
1. The following table gives the systolic blood pressure (SBP) and body size
(QUET) for a sample of 14 white male over 40 years old from the town of Angina.
(QUET stands for quetelet index, a measure of size defined by QUET=100
(we
Exercises for Chapter 7
1. Which of the following statements best describes the Central Limit Theorem?
(a) In a sampling from a population having a mean and a standard deviation
, the mean and standard deviation
of the sampling distribution of the sample
Exercises for Chapter 1
Question 1 6 define or describe certain statistical terms. Choose from the
following list the appropriate term.
(a) Descriptive statistics
(d) Statistical inference
(b) Population
(e) Sample
(c) Statistic
(f) Parameter
1. The proce
Frequency Tables
In frequency tables, we can pile the data by counting the number of data values in each category of
interest. We can organize these counts into a frequency table, which records the totals and the category
names.
A relative frequency table
Comparing Two Proportions
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Construct the indicated confidence interval for the difference in proportions. Assume that the samples are
independent a
Two Sample Mean Tests
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Construct the indicated confidence interval for the difference between the two population means. Assume that the
assumptions
Analysis of Variance
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
State the null and alternative hypotheses.
1) A horticulturist wants to test the effectiveness of four types of fertilizer on
Chi Squared Tests
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Decide which chisquare test (goodnessof fit, homogeneity, or independence) would be most appropriate for the
given situation.
Chapter 3 Notes
Distribution of Quantitative Data: First, slice up the entire span of values covered by the quantitative
variable into equalwidth piles called bins (classes). The bins and the counts in each bin give the
distribution of the quantitative v
Exam
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Provide an appropriate response.
1) A random sample of records of electricity usage of homes gives the amount of electricity used in July and
Exam
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Provide an appropriate response.
1) The distribution of salaries of professional basketball players is skewed to the right. Which measure of
Fall 2016
STAT151
Introduction to Applied Statistics
Dr. Thomas Varghese
CAB 569
Mathematical & Statistical Sciences
Section 1a
Exploring
and Understanding Data
Descriptive Statistics (Chapter 1 to 8)
This set of notes are for Chapters 1 to 4
Statistic
Chapter 14 and 15
1. A random variable assumes a value based on the outcome
of a random event. We use a capital letter, like Y, to
denote a random variable. A particular value of a random
variable will be denoted with a lower case letter, in this
case y.
Stat 151 Midterm Version 222
LAST NAME: _
FIRST NAME: _
STUDENT ID: _
STAT 151 SECTION: _
Instructions:
1) Personal items must be placed aside prior to the start of the exam.
2) All portable electronic devices must be turned off, including cell phones, pa
Exam
Name_
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Using the ttables, software, or a calculator, estimate the critical value of t for the given confidence interval and
degrees of freedom.
1)
13th
Name
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) The Addition Rule says that P(A or B) = P(A) + P(B). What must be true about events A and B for 1)
this rule to apply?
A) The events must
Chapter 12 and 13
A random phenomenon is a situation in which we know what outcomes could happen, but we dont
know which particular outcome did or will happen. In general, each occasion upon which we observe a
random phenomenon is called a trial.
At each
Stat 151 Midterm Version 333
LAST NAME: _
FIRST NAME: _
STUDENT ID: _
STAT 151 SECTION: _
Instructions:
1) Personal items must be placed aside prior to the start of the exam.
2) All portable electronic devices must be turned off, including cell phones, pa
MULTIPLE CHOICE. Choose the one alternative that best completes the
statement or answers the question.
Fill in the blanks by standardizing the normally distributed variable.
1) Dave drives to work each morning at about the same time. His
commute time is n
Chapters 15:
Population vs. sample Parameter vs. statistic
Statistics: Descriptive vs. inferential
Types of variables
Quantitative vs. Qualitative
/

Discrete Continuous
Tables, charts & graphs
 frequency tables
 qualitative: bar graph/pie chart
 ste
Name_ Section_ Date_
1.
When studying the simultaneous responses to two categorical questions, we should set up a
a. contingency table.
b. frequency distribution table.
c. cumulative percentage distribution table.
d. histogram.
2.
Data on 1,500 students h