A2
1
19 NAME:
Mary McInturff
e-mail
mmcintur@iupui.edu
A random sample of size 5 yields the following data:
86
25
58
30
65
The mean is:
a
= 52.8
b
= 54.6
c
x = 52.8
d
x = 54.6
2
Enter your LETTER answers HERE
a
b
c
d
Treat the set below as population da
NAME: Mary McInturff
Next 7 question are based on the following information:
The following table is partial probability distribution for the InTech Companys projected profits (x = profit in
thousands of dollars) for next year (the negative value denotes a
NAME:
A2
e-mail:
Next FOUR questions are based on the following:
Table below shows the probability distribution of the number of traffic accidents daily in a small city.
x
0
1
2
3
4
1
a
b
c
d
2
f(x)
0.10
0.20
0.45
0.15
0.10
What is the probability of 2 or
NAME: Mary McInturff
A2 e-mail:
mmcintur@iupui.edu
z is the standard normal random variable.
1 P(z < 1.25) = _.
a
0.8416
b
0.8676
c
0.8944
d
0.9123
2
a
b
c
d
P(z > 1.55) = _.
0.0576
0.0606
0.0848
0.1018
a
b
c
d
P(-1.75 < z< 0.00) = _.
0.4599
0.4461
0.4327
E270 self notes Chapter 1
Statistics: a discipline which studies the collection, organization presentation, analysis, and
interpretation of numerical data.
2 branches of statistics:
Descriptive statistics: deals with the collection, organization, and pres
NAME: Mary McInturff
Next THREE questions are based on the following information:
A random sample of size 5 yields the following data:
13
20
24
17
16
1)
The mean of the sample is:
a) = 20
b) x = 20
c) = 18
d) x = 18
2)
a)
b)
c)
d)
3)
The sum of squared de