For the following exercises, draw a graph that satisfies the given specifications for the domain x = [ − 3 , 3 ] . The function does not have to be continuous or differentiable. 220. There are local maxima at x = ± 1 , the function is concave up for all x, and the function remains positive for all x .
For the following exercises, draw a graph that satisfies the given specifications for the domain x = [ − 3 , 3 ] . The function does not have to be continuous or differentiable. 220. There are local maxima at x = ± 1 , the function is concave up for all x, and the function remains positive for all x .
For the following exercises, draw a graph that satisfies the given specifications for the domain
x
=
[
−
3
,
3
]
. The function does not have to be continuous or differentiable.
220. There are local maxima at
x
=
±
1
, the function is concave up for all x, and the function remains positive for all x.
Formula Formula A function f(x) attains a local maximum at x=a , if there exists a neighborhood (a−δ,a+δ) of a such that, f(x)<f(a), ∀ x∈(a−δ,a+δ),x≠a f(x)−f(a)<0, ∀ x∈(a−δ,a+δ),x≠a In such case, f(a) attains a local maximum value f(x) at x=a .
Example 4 (Part 2) We can use Statkey to take 50 different random samples of size 20 each, find the mean of
each sample, and compute a confidence interval for each one. The graph of the sampling distribution of the means
is on the left below, and that of the 50 confidence intervals is on the right.
1. What does each dot on the left hand dotplot represent?
StatKey Sampling Distribution for a Mean
Percent with Internet Access (Countries) ▾
Show Data Table Edit Data
Choose samples of size n =
20
Upload File
Change Column(s)
Generate 1 Sample
Generate 10 Samples
Generate 100 Samples
Generate 1000 Samples
Reset Plot
Sampling Dotplot of Mean
Left Tail Two-Tail Right Tail
60
50
40
40
30
20
20
10
samples = 50
mean = 41.626
std. error = 5.089
:
.:
:
::
0
25
30
35
40
45
50
55
60
41.626
Data Plots
Confidence Intervals
95%->
Confidence Intervals
Coverage
48/50 = 96%
20
40
60
80
2. Circle the confidence intervals that failed to capture the true mean.
3. Circle the sample means that produced those…
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
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