This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Without some correction, sample variability is said to be biased.. Define the term biased, and ... (Read 72 times)

sam.t96

  • Hero Member
  • *****
  • Posts: 570
on: Jun 20, 2018
Without some correction, sample variability is said to be biased.. Define the term biased, and explain how this bias is corrected in the formula for sample variance.
 
  What will be an ideal response?

Question 2

For the following sample, use the computational formula to calculate SS and then compute the sample variance and standard deviation. Scores: 1, 3, 1, 1
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vish98

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jun 20, 2018
Answer to Question 1

Without some correction, sample variability tends to be smaller than the population variability. Whenever a statistic consistently underestimates (or overestimates) the corresponding population parameter, the statistic is said to be biased. The bias in sample variability is corrected by dividing the sum of squared deviations (SS) by n  1 (instead of n) in the formula for sample variance.

Answer to Question 2

SS = 3, 2 = 1, and  = 1


sam.t96

  • Member
  • Posts: 570
Reply 2 on: Jun 20, 2018
Excellent

Bigfoot1984

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Frequency distribution curve: interpatient variability in drug response Frequency distribution curve: interpatient variability in drug response
Sample tiered drug formulary for antibiotics. Sample tiered drug formulary for antibiotics.
Human activity has released carbon from sequestration in long-term reservoirs Human activity has released carbon from sequestration in long-term reservoirs
Correction of acid and base imbalance Correction of acid and base imbalance
A random sample of 87 airline pilots recruited by an airline service had an average yearly ... A random sample of 87 airline pilots recruited by an airline service had an average yearly ...
A sample of baking soda is heated and releases carbon dioxide gas into a 1000-mL A sample of baking soda is heated and releases carbon dioxide gas into a 1000-mL
Video: Condensation and Hydrolysis Animation

For a complete list of videos, visit our video library