Question

What happens to the variance when outliers are eliminated &
replaced by values closer to the mean?

A.
It depends on the size of your sample

B.
Increases

C.
Decreases

Answer #1

Answer : **(C) Decreases**

The variance will decrease when outliers are eliminated & replaced by values closer to the mean.

Variance (σ^{2}) is a measurement of the spread between
numbers in a data set. It measures how far each number in the set
is from the mean ,and is calculated by taking the differences
between each number in the set and the mean, squaring the
differences (to make them positive) and dividing the sum of the
squares by the number of values in the set. Hence we choose value
closer to mean, the variance will obviously decreases

if the median is much closer than the mean, then the outliers in
the sample must be:
a. really low
b. somewhat low
c. close to the mean
d. close to the mode
e. high
critical values of one directional tests are
a. always lower than two directional tests
b. always the same as two directional tests
c. always higher than two directional tests
d. it depends on the test
e. it depends on the obtained value
if the mode...

For each of the following situations, state what happens to the
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A) Population standard deviation increases
B) Sample size decreases (assuming CLT still holds)
C) Confidence level decreases
D) Sample mean increases

1. When consumers are more optimistic about future
economic conditions, what happens to aggregate demand?
a. Aggregate demand stays the same.
b. Aggregate demand decreases.
c. Aggregate demand increases.
d. The effect is uncertain as it depends on other factors.

1.when the sample mean is close to the population mean
, the sampling error is
a. larger
b. smaller
c. equals to 1
d. none of the above is correct
2. when the sample size increases, the dispersion
among the sample means
a. increases
b. decreases
c. remain the same
d. depends upon the specific population being sampled

What happens to portfolio variance when a. the correlation
between securities decrease? b. the number of assets in the
portfolio increases? (Assume correlation among assets are not
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Check the boxes for the predictions of what happens in the
neoclassical model when TFP or A increases:
C increases
Y increases
S decreases
L increases
r decreases
W/P decreases

The following exercises are "what-if" analyses designed to
determine what happens to the test statistic and interval estimates
when elements of this statistical inference is changed:
a. A statistics practitioner took a random sample of size 56.
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respectively
B. Determine the 95% confidence interval estimate of the
population mean.
C. Repeat part (a) changing the sample mean to 30.
D. Describe what happens to the width of the interval when...

Consumers perceive bread and tortillas are substitutes. What
happens in the market for bread when the price of tortillas
increases?
Supply of bread increases
Supply of bread decreases
Demand for bread increases
Demand for bread decreases

If you increase your load factor by doing a high g turn, what
happens to your aircraft's Specific Excess Power? (29.2)
A.
It increases because the increased g s make the aircraft more
maneuverable
B.
It increases because the aircraft can turn better at high load
factors
C.
It decreases because more power is required to overcome the
increased induced drag
D.
It decreases because the aircraft is limited structurally to a
maximum load factor. Since it is closer to...

(part1) What happens to the real wage in terms of food if the
nominal wage increases and the price of food is constant?
a. increases
b.decreases
c.remains the same
d. we cannot know what happens
(part 2) Imagine that Lc increases when trade opens. As a
result, what happens to MPLc and what does that mean for the real
wage in terms of Qc?
a.MPLc increases, so the real wage in terms of Qc increases
b.MPLc increases, so the real...

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