Question

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

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
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer : (C) Decreases

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

Variance (σ2) 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

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
if the median is much closer than the mean, then the outliers in the sample must...
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 width of the confidence interval....
For each of the following situations, state what happens to the width of the confidence interval. Justify your answers. 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....
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.
What happens to portfolio variance when a. the correlation between securities decrease? b. the number of...
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 perfect)
Check the boxes for the predictions of what happens in the neoclassical model when TFP or...
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
1.when the sample mean is close to the population mean , the sampling error is a....
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
The following exercises are "what-if" analyses designed to determine what happens to the test statistic and...
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. The sample mean and standard deviation are 70 and 12, 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...
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...
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...
(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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT