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

Author Question: Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500 ... (Read 203 times)

bio_gurl

  • Hero Member
  • *****
  • Posts: 524
on: Jun 24, 2018
Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500 . The sample mean is 120, and the sample standard deviation is determined to be 36.
 a. Estimate the standard error of the mean.
  b. Develop an approximate 95 confidence interval for the population mean.
  c. Estimate the population total.
  d. Develop an approximate 95 confidence interval for the population total.

Question 2

According to the Empirical Rule, if the data form a bell shaped normal distribution approximately ___________________ _ percent of the observations will be contained within 3 standard deviations around the mean.
 Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

heyhey123

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 3.7 (rounded)
b. 112.68 to 127.32
c. 60,000
d. 56,338.3 to 63,661.7

Answer to Question 2

99.7


bio_gurl

  • Hero Member
  • *****
  • Posts: 524
Reply #2 on: Jun 24, 2018
Correct answers!


heyhey123

  • Sr. Member
  • ****
  • Posts: 353
Reply #3 on: Jun 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Relatively simple changes in Hox genes control limb formation in tetrapods. Relatively simple changes in Hox genes control limb formation in tetrapods.
Species richness increases with island size. Species richness increases with island size.
Effect of stimulus strength on size of graded potential. Effect of stimulus strength on size of graded potential.
A sampling of the modified and unusual bases found in tRNAs A sampling of the modified and unusual bases found in tRNAs
The Great Spike in World Population Growth The Great Spike in World Population Growth
Core-promoter elements found in focused promoters Core-promoter elements found in focused promoters
Video: Interview with Person who has Panic Attacks

For a complete list of videos, visit our video library