Blair Estilette
HW pg. 43 # 30
1. Values of grocery spending range between 0 and 600
2.Range containing a majority of the observations: Amounts is concentrated between 200 and
300 , and 80% of the grocery spending were in this range.
3. The class with the
Blair Estilette
QMET 251-002
In this graph, I notice that Kane location excels in the numbers more than the Olean location.
This data is considered to be qualitative because you cannot put a whole number to the
location. You also cant get an average numbe
Skylar Thomas Homework Chapter 14 Question #18
Annual sales ($ millions) Y
Annual sales ($ millions) Y
# of retail outlets, X1
# of auto registered (mil), X2
Personal income ($ bil), X3
Averge age of auto (years), X4
# of supervisors, X5
1
0.8994224429
0.
bsat 303: Final Exam Study Guide
Note: The study guide should be used along with the classroom lectures I
posted to Moodle, your personal notes from my lectures, and the information
found within the chapters.
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A Hypothesis is a statement about the value of a population parameter developed for the purpose of testing.
Hypothesis testing is a procedure, based on sample evidence and probability theory, used to determine whether the hypothesis
is a reasonable statem
Why sampling
(1) To contact the whole population would be time consuming. (2) The cost of studying all the items in a population may be prohibitive.
(3) The physical impossibility of checking all items in the population. (4) The destructive nature of some
Continuous probability distribution
Characteristics:
1) bell-shaped
2) symmetrical (mean = mode = median)
3) asymptotic: the tails of the curve get closer to X- axis but never actually touches it.
4) the location of the distribution is determined by the m
Experiment: Toss a coin three times. Observe the number of heads. The possible results
are: zero heads, one head, two heads, and three heads.
What is the probability distribution for the number of heads?
Random variable - a quantity resulting from an expe
A few definitions
Probability - a value between 0 and 1, inclusive, describing the relative possibility (chance or likelihood) an event will occur.
Experiment - a process that leads to the occurrence of one and only one of several possible observations.
O
Dot plot
most useful for smaller data sets, and histograms for large data sets.
Steps in creating dot plot in Excel
(1) A Dot Plot is simply an XY chart with a dummy Y axis series. First organize the data by sorting
the # of cars sold in, with the lowest
511
210
385
97
Population mean
Note:
Q15, P. 62
Nurse types
Nurse's aid
Practical nurse
Registered nurse
275
50
257
249
234
36
23
13
=
195 (using the average function provided in Excel, Average(.)
= 2340/12 = 195 (using the formula way)
The mean of a pop
Relative Frequency Table for vehicles sold
Relative class frequencies show the fraction of the total number of observations in each class,
capturing the relationship between a class total and the total number of observations.
Location
Kane
Olean
Sheffield
CHAPTER 5
A SURVEY OF PROBABILITY CONCEPTS
1.
Outcome
1
2
3
4
1
A
A
F
F
2
A
F
A
F
2.
Outcome
1
2
3
4
5
6
7
8
9
1
A
A
A
R
R
R
S
S
S
2
A
R
S
A
R
S
A
R
S
Chapter 5
52
3.
a.
b.
0.176 found by 6/34
Empirical
4.
a.
b.
0.40, found by 2/5
Classical
5.
a.
b.
c.
d.
TEST 1
QUIZ 1
1. The names of the positions in a corporation, such as chief operating officer or controller, are examples of
what type of variable?
Select one:
a. Quantitative
b. Ratio
c. Interval
d. Qualitative
2. What level of measurement is the number