IS310 EXAM 1 Version A (60 minutes) -KEYS
1. The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of
accidents is an example of
a. descriptive statistics
b. statistical inference
c. a
Chapter 9 p.382 #60-64, 68-70
p.382 #60
a). H 0 : = 16 H a : 16 z p-value .0286 .05 z p-value .2186 .05 2.19 0.0286 reject H0 -1.23 0.2186 do not reject H0 continue operation
b).
c).
d).
Reject H 0 if z -z/2 OR z z/2 part b 2.19 1.96 reje
CHAPTER 12TESTS OF GOODNESS OF FIT AND INDEPENDENCE
1.
A population where each element of the population is assigned to one and only one of several classes or categories is a
a.
b.
None of these alternatives is correct.
Poisson distribution
t distribution
1.
Statistical Inference about means and proportions with two populations
If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, the
a.
null hypothesis should state P1 - P2 0
CHAPTER 11INFERENCES ABOUT POPULATION VARIANCES
1.A sample of 60 items from population 1 has a sample variance of 8 while a sample of 40 items from population 2 has a sample variance of 10. If we test whether the
variances of the two populations are equal
IS 310 Final Notes
Chapter 9: Hypothesis Tests
1. Developing Null and Alternative Hypotheses a. Hypothesis testing: used to determine whether a statement about the value of a population parameter should or should not be rejected. b. Null hypothesis:
IS310 EXAM 2 Version A (75 minutes) Chapters 3-5: Open notes (Chapter
0 PPT with your own hand-written notes), 3 probability tables & calculator.
No phone/laptop. KEYS
NAME (must enter) Mark A on scantron - If not, point deduction applies _
1. In statisti
IS310 EXAM 2 Version A (75 minutes) Chapters 3-5: Open notes
(including Chapter 0 PPT with your hand-written notes on it, Chapter
reviews 1-5), 3 probability tables & calculator. No phone/laptop
NAME (must enter) Mark A on scantron - If not, point deducti
IS310 EXAM 1
Practice 2 with KEYS
1. Categorical data
a. indicate either how much or how many
b. cannot be quantitative
c. must be nonnumeric
d. none of the above
2. For ease of data entry into a university database, 1 denotes that the student is an under
IS310 EXAM 1 Practice 2 without KEYS
1. Categorical data
a. indicate either how much or how many
b. cannot be quantitative
c. must be nonnumeric
d. none of the above
2. For ease of data entry into a university database, 1 denotes that the student is an un
IS310 EXAM 1 Version A (60 minutes)
Mark A on scantron. If missing, 1 point deduction
Open Core document (Chapter 0 PPT) with your own hand-written notes. Calculator allowed. No laptop, no phone.
VIOLATORS WILL BE ESCORTED OUT OF CLASS ROOM
Name (must ent
8/22/16
CHAPTER 1:
Data: raw fact that has no meaning by itself
Information: process data or meaningful data.
i.e.: SS#, telephone number, etc.
Once you process it into the computer it will become meaningful data
Entity or Element: characteristics of th
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IS 310 Business Statistics
CSU LONG BEACH
Business
Statistics
IS 310
Slide
1
Why Statistics?
TEN REASONS TO BECOME A STATISTICIAN
Deviation is normal.
We feel complete and sufficient.
We are "mean" lovers.
Statisticians do it discr