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Math 240 Extra Credit
1.
Which of the following statistics is not a measure of central tendency?
a. Mean.
b. Median.
c. Mode.
d. Q3.
2.
Which of the following is NOT sensitive to extreme values
1. Would you have been long or short on Blockbuster stock at the time of the case? How about Netflix? Why? In January 2007, the Netflixs case was addressed and analyzed by Harvard Business School. In
GOLDEN GATE UNIVERSITY
Math 40-Mid-term
Fall 2015
Instructor: Nabanita Talukdar
9/24/15
Student Name:
Total Points: 60 (30*2)
Circle the correct answer
1) Which of the following is a discrete quantita
GOLDEN GATE UNIVERSITY
Math 40-Mid-term
Summer 2015
Instructor: Nabanita Talukdar
6/24/2015
Student Name:
Total Points: 60 (30*2)
Circle the correct answer
1) Which of the following is a discrete quan
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In its standardized form, the normal distribution
Select one:
a. has a mean of 0 and a standard deviation of 1.
b. has a mean of 1 and
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Which of the following is a discrete quantitative (numerical) variable?
Select one:
a. the distance you drove yesterday.
b. the
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If you were constructing a 99% confidence interval of the population mean based on a sample of
n = 25 where the standard deviatio
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3) The Central Limit Theorem is important in statistics because
Select one:
a.
for a large n, it says the sampling distribution o
EXAMPLES: SESSION 3
KEY DEFINITIONS: Experiment, Event, and
Sample Space.
By experiment, we mean an action whose outcome cant be predicted with
certainty. Rolling one die is an experiment; we dont kno
EXAMPLES: SESSION 4
MULTIPLICATION RULES
Example 1:
When you toss a coin, theres a 50% probability of heads and a 50%
probability of tails. Each separate coin toss is a statistically independent
event
EXAMPLES: SESSION 1
Example 1:
(a) Is the table displayed below an example of descriptive statistics or
inferential statistics? Explain your reasoning.
(b) What type of variable is displayed in the ta
PRACTICE PROBLEMS: SESSION 1
#1
Classify the variables in the paragraph below as numerical and continuous;
numerical and discrete; categorical; ordinal scale.
A typical Super Steak restaurant serves a
THREE TYPES OF PROBABILITY
[These descriptions will help you with the Session 3 project.]
a priori probability: a priori translates roughly as from before,
meaning we know everything about the sample
GOLDEN GATE UNIVERSITY
Math 40-Mid-term
Fall 2015
Instructor: Nabanita Talukdar
9/24/15
Student Name:
Total Points: 60 (30*2)
Circle the correct answer
1) Which of the following is a discrete quantita
Homework Assignment 4
Chapter 7
Problems from Section 7.2
Exercise 7.5
Exercise 7.7
Exercise 7.8
7.5
(a)
Because the population diameter of tennis balls is approximately normally distributed, the
samp
MATH 40 FINAL EXAM, INSTRUCTOR-John Morales
Name_Barbara Chavez_
Due Date: 04/22/17 (Time 12:00 PM)
Total points- 30*2=60 points
MULTIPLE CHOICE: Choose the one alternative that best completes the sta
Answer Keys Homework 6
Section 9.1
Q 9.4, Q 9.14, Q9.15
9.4
Decision rule: Reject H0 if Z STAT < 2.58 or Z STAT > + 2.58.
9.14
(a)
PHStat output:
Data
=
Null Hypothesis
375
Level of Significance
0.05
Homework Assignment 5
Exercise 8.1, 8.2, 8.5, 8.9, 8.10
Exercise 8.11, 8.12, 8.18, 8.19, 8.20
8.1
X Z
8
= 85 1.96
n
64
8.2
X Z
24
= 125 2.58
n
36
8.5
If all possible samples of the same size n=100
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If the outcome of event A is not affected by event B, then events A and B are said to be
Select one:
a. mutually exclusive
b. independe
Answer Keys Homework Assignment 5 Summer
8.1
X Z
8
= 85 1.96
n
64
8.2
X Z
24
= 125 2.58
n
36
8.5
If all possible samples of the same size n=100 are taken, 95% of them will include the true
populat
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Which of the following would be an appropriate null hypothesis?
Select one:
a.
The mean of a population is equal to 55.
b.
The me
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Which of the following statistics is not a measure of central tendency?
Select one:
a. Arithmetic Mean
b. Median
c. Third Quartile (Q3)
GOLDEN GATE UNIVERSITY
Math 40-Mid-term
Summer 2015
Instructor: Nabanita Talukdar
6/24/2015
Student Name:
Total Points: 60 (30*2)
Circle the correct answer
1) Which of the following is a discrete quan
Answer Keys Homework Assignment 3
6.1
PHStat output:
Normal Probabilities
Common Data
Mean
0
Standard Deviation
1
Probability for a Range
Probability for X <=
From X Value
1.57
X Value
1.57
To X Value
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A company has 125 personal computers. The probability that any one of them will require repair
on a given day is 0.025. To find the pro
Answer Keys Homework 6 (due date 07/23/2014)
Section 9.1
Q 9.4, Q 9.14, Q9.15
9.4
Decision rule: Reject H0 if Z STAT < 2.58 or Z STAT > + 2.58.
9.14
(a)
PHStat output:
Data
=
Null Hypothesis
375
Level
MATH 40 FINAL EXAM, INSTRUCTORName_ Due Date: 04/22/17 (Time 12:00 PM)
Total points- 30*2=60 points
MULTIPLE CHOICE: Choose the one alternative that best completes the statement or answers
the questio
MEAN or MEDIAN?
Why do housing price exhibits always report median price instead of mean price?
The arithmetric mean is very susceptible to outliers, that is, individual data values that are much
high
HOW DO WE USE STANDARD DEVIATION?
The standard deviation is a statistic that tells you how tightly all the various
individual data points are clustered around the mean in a set of data. When the
indiv