Question

matlab keep ignoring negative values when i plot the data....

what should i do to plot negative numbers...

Answer #1

Here is one of the example to plot the negative value, I used "axis" function.

tt = -0.00025:0.00001:0.00025;// setting the time axis y1 = 20*cos(2*pi*(2000)*(tt -37.2/10));//one of the function

tt = -0.00025:0.00001:0.00025;// setting the time axis

y2 = 14*cos(2*pi*(4000)*(tt +41.3/10));//

y3= y1+y2;//An operation on signal

subplot(3,1,1) plot(tt,y1) title('Y1') xlabel('Time') axis([min(tt) max(tt) ylim])

subplot(3,1,2) plot(tt,y2) title('Y2') xlabel('Time') axis([min(tt) max(tt) ylim])

subplot(3,1,3) plot(tt,y3) title('Y3') xlabel('Time') axis([min(tt) max(tt) ylim])

The following sample observations were randomly selected.
(Do not round the intermediate values. Negative amount
should be indicated by a minus sign. Round your answers to 3
decimal places.)
X: 6,5,3,6,10
Y: 6,6,4,7,7
a. Determine the 0.95 confidence interval for the mean predicted
when x = 9.
b. Determine the 0.95 prediction interval for an individual
predicted when x = 9.

I am to create a scatter plot with two sets of data (there is a
lot more data than what is posted below but the whole data set was
too large to post). I am then to complete a Pearson R
test for significance and test for goodness of fit using
R2. How do I create a scatter plot with the data? How do
I complete the required tests of the data?
Score
# BSN
Pearson r
536.17
5
T
.DIST...

The following sample observations were randomly selected.
(Do not round the intermediate values. Negative amount
should be indicated by a minus sign. Round your answers to 3
decimal places.)
X:
5
5
2
6
10
Y:
4
6
5
5
7
Determine the 0.99 confidence interval for the mean predicted
when x = 7.

Could you please explain me why an when do I have to use the
negative binomial distribution for Problem 15 in chapter 2 (rice-
mathematical statistics and Data Analysis 3rd Edition). I wanted to
use the normal binomial distribution but I come to the wrong
results....

The following sample observations were randomly selected. (Do
not round the intermediate values. Negative amount should be
indicated by a minus sign. Round your answers to 3 decimal
places.)
x
y
6
4
4
6
1
5
6
4
10
9
Determine the 0.90 confidence interval for the mean predicted
when x = 8.
Determine the 0.90 prediction interval for an individual
predicted when x = 8.

how should i run my data when i have 4 categories under 1
policy. should i use dummy variable for each categories or should i
average the 4 categories. this is my model export = β + β1adoption
rate + β2 policy

how should i run my data when i have 4 categories under 1
policy. should i use dummy variable for each categories or should i
average the 4 categories. this is my model
export = β + β1adoption rate + β2 policy

2. Expected Values:
a) What is the formula for Expect[X] for some data set X, when X is
continuous and when X is discrete?
b) Must an expected value of a data set be an element of that set?
Why or why not?
c) How is the expected value similar to or different from other
measures of center such as the median or mode?
d) What is the difference between theoretical expected values and
experimental (sample) means?
i. When is...

What equations and statements should be used for this problem?
Do I select any hypothesis I want? How do I phrase the hypothesis
and write the equations? If I have data, what makes the hypothesis
true or false?
1) Conduct hypothesis test by comparing monthly average between
the two year
2) Within each year, run a appropriate hypothesis comparing June
and August.

Suppose that you follow a population over time. When you plot
your data on a semilog plot (using logs with base 10), a straight
line with slope 0.21 results. Furthermore, assume that the
population size at time 0 was 50. What function best describes the
population size at time t?
Population at time t is ________________ (simplify as much as
you can, there should be no logs in answer)

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