6.4 To find the area under the standard normal curve between two values, z1 and z2, calculate the difference in their
cumulative areas,
=
A A ( z2 ) A ( z1 ) .
6.6
a
=
A A (1.4 ) A ( 1.4
=
= 0.8384
)
Page 1 of 5
UNIVERSITY OF WINDSOR
DEPARTMENT OF AMTHEMA TI CS AND STA TISHCS
03-65-205-02; Winter 2017; Quiz 1
Maximum Time: 45 Minutes S: Q
._
LAST NAME: FIRST NAME:
I.D.#:
. This test has 5 pages i
Assignment #1
1. The population (N) will be identified by the total amount of hospital patients; whereas, the
sample (n) would identify with the 1000 randomly selected patients used by the study.
2. A
Aspartame: Is It Really Needed?
Is aspartame needed as a sugar-free low calorie replacement for sugar? Is it really
as health concerning as people say? Do the benefits outweigh the potential risks? Is
1. A) i) P(z>5) according to the z-table, this is non existent, which means P(z>5)= 0.
ii) P(-3<z<3) = (0.0013+0.9987) 0.0013 = 0.9987
B) P(z < x) = 0.1
z = -1.28
C) P(-z < z < z ) = 0.9
P(-z<z ) P(z>
1. A) i) P(z>5) according to the z-table, this is non existent, which means P(z>5)= 0.
ii) P(-3<z<3) = (0.0013+0.9987) 0.0013 = 0.9987
B) P(z < x) = 0.1
z = -1.28
C) P(-z < z < z ) = 0.9
P(-z<z ) P(z>
G Stanley hall, john Watson [nature v nature]
Watson, spock [parenting plans]
Continuity v discontinuity
Idealists, empiricists, interactionists
Theory- idealists, empiricists, interactionists
Interna
4.6
a
b
The experiment consists of selecting 1 of 25 students and recording the students gender as well as
whether or not the student had gone to preschool.
The experiment is accomplished in two stage
Solution to assignment #: 65-201-91 F15
1.2
a
b
c
d
1.20
a
Time to assemble is a quantitative variable because a numerical quantity (1 hour, 1.5 hours, etc.) is
measured.
Number of students is a quant
8.38
a
The point estimate of p is p
x 68
0.136, and the approximate 95% confidence
n 500
interval for p is
0.136 0.864
pq
0.136 1.96
0.136 0.030 or
n
500
0.106 p 0.166
p 1.96
b
In order to increa
9.22
a
b
The null hypothesis of interest is one-tailed:
H0 : 1 2 0 versus Ha : 1 2 0
The test statistic, calculated under the assumption that 1 2 0, is
x x 0
6.9 5.8
z 1 2
2.074
2
2
2
2
s1 s2
2.9
1.2