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
) 0.9192 0.0808
b
=
A A ( 3.0 ) A ( 3.0
=
= 0.9974
) 0.99
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 this
just a bunch of rhetorical questions?
C14H18N2O5,
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>z ) = 0.9
P(-z<z ) (1- P(z<z ) = 0.9
P(-z<z ) = 0.9 + 0
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>z ) = 0.9
P(-z<z ) (1- P(z<z ) = 0.9
P(-z<z ) = 0.9 + 0
G Stanley hall, john Watson [nature v nature]
Watson, spock [parenting plans]
Continuity v discontinuity
Idealists, empiricists, interactionists
Theory- idealists, empiricists, interactionists
Internal influences
Critical period v sensitive period
Behavio
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 stages, as shown in the tree diagram below.
Gender
Preschool
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 quantitative variable because a numerical quantity (1, 2, et
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 increase the accuracy of the confidence interval, you must de
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
n1 n2
35
35
The rejection region, with 0.05, is z 1.64
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) This is a qualitative variable.
B) This is a quantita