« previous next »

Author Question: If the desired precision to estimate a mean is increased by a factor of four (for example, from 40 ... (Read 54 times)

TFauchery

  • Hero Member
  • *****
  • Posts: 500
on: Jun 29, 2018
If the desired precision to estimate a mean is increased by a factor of four (for example, from 40 to 10) the sample size is increased by a factor of __________, all else equal.
 a. 30.0
  b. 4.0
  c. 16.0
  d. 2.0
  e. 32.0

Question 2

Two standard deviations about the mean of a normal distribution include approximately __________ of all observations.
 a. 90
  b. 95
  c. 99
  d. Can't say; it depends on the individual sample variance.
  e. Can't say; it depends on the size of the population.


emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jun 29, 2018
Answer to Question 1

C

Answer to Question 2

b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ... Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ...
By how many times will the population of bacteria have increased after 6 h? By how many times will the population of bacteria have increased after 6 h?
A latex agglutination test for rheumatoid factor. A positive control at 1. A negative control at 2. ... A latex agglutination test for rheumatoid factor. A positive control at 1. A negative control at 2. ...
Find the factor demand for labour and the amount of output it will produce. Show all ... Find the factor demand for labour and the amount of output it will produce. Show all ...
Translation Elongation Factor Homologs Translation Elongation Factor Homologs
Video: Male Reproductive System - The gonadotropin releasing hormone

For a complete list of videos, visit our video library